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Updated July 21, 2017
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Sphere Research Coporation, CLICK to visit! Sphere Research Corporation
3394 Sunnyside Rd.
West Kelowna, BC, Canada V1Z 2V4
Phone: +1 (250) 769-1834

Please Note:
All Prices are in US$


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   I'm in a HURRY! Show me all the: CLICKNIB Rules CLICKNIB Pickett Rules CLICKPocket Rules CLICKCircular Rules
July 21, 2017 CLICK for bigger PIC!
CLICK to see new 111/54A full sized Addiator Rules!

Addiator rules (with a built-in adding machine on the back) are few and hard to come by. Here are two new complete sets for your computing enjoyment.
July 7, 2017 Click to see!
CLICK to see Post 1441, 1444K and 1461 Pocket Versalog rules!

Lots of hours spent in the overhaul shop to bring you a big batch of sparkling, ready-to-use Post pocket rules, all with the lightweight bamboo body that gives long life with smooth operating action. My apologies for being behind on overhaul work, we are working through a backlog of about 200 rules, and hope to get them all ready to go and listed soon. These Post (Hemmi) pocket rules are very popular thanks to their light pocket weight and great performance, especially the 1461 Pocket Versalog..
December 29, 2016 CLICK to SEE!
CLICK to see Hemmi 257 Chemical rules!

A rare treat, two different Hemmi 257 and 257L CHEMICAL rules. Very hard to find these, and these sets are excellent examples.
December 27, 2016 CLICK to see!
CLICK to see 20 inch rules!

A rare treat, 20 inch MINT Faber-Castell rules from Ray Hems in England. We seldom get 20 inch rules, and these are simply amazing. The sets are complete with all accessories, and original factory english manuals. Don't miss these!
December 22, 2016 BIG shipment of 10 inch NEW BOXED FC, Logarex, Staedtler-Mars, Nestler and Aristo rules from Ray Hems in England. They are being posted as soon as possible, but includes 1/54, 1/98, 1/28 544A, and many more. Some very uncommon models in this batch, many we have never had before. Please see THIS PAGE as they get ADDED. Please e-mail WALTER for early details.
October 10, 2016 Our mobile-compatible site-wide re-write is underway, this will take at least a month, but should allow for much easier phone browsing. If you see any problems, or have re-write suggestions, please e-mail WALTER here.
July 31, 2016
Super School Slide Rule Packs
Super School Pack, CLICK to see!


Koh-I-NoorA fantastic Logarex/Koh-I-Noor school pack with both full sized and pocket rules, and free educational books from the Oughtred Society on mini-CD. And just in time for school, WITH FREE SHIPPING! Limited deal, just 100 sets available.
January 1, 2016
FINALLY, we have BRAND NEW Leather Pocket Slide Rule Cases!
CLICK to see!


It took us 5 years to find a suitable vendor, and get the cases optimized just right, finally we have beautiful, inexpensive leather pocket clip cases for your favorite pocket rules!

December 13, 2015
Over 500 NEW slide rules posted CLICKHERE
And CLICKHERE.
Hundreds of brand new pocket and full sized rules just arrived,
all at excellent prices.
WAHOO! How often does that kind of thing happen? Some great low cost stocking stuffers for your mathematically minded friends and family.


November 27, 2015
The Auction IS NOW CLOSED!
Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page

Thanks to everybody that bid, these funds will go to very good use locally by our food banks. While the auction is now over, any item still sitting at the starting bids (no names), can still be bid on until monday at 9am, first bid over the starting price takes it.

November 27, 2015
The Auction ends TONIGHT, 9PM (PST)
Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page

Have some fun and do some good at the same time, wahoo!

November 25, 2015
More GOODIES added to the annual
Slide Rule Food Bank Auction
Have a Look!!

Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to see!

CLICK to see all the amazing auction items, including a 7 digit vintage Lightning Calculator! Ends Friday November 27th!

November 22, 2015
More GOODIES added to the annual
Slide Rule Food Bank Auction
Have a Look!!

Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to see!

CLICK to see all the amazing auction items, including a Faber Castell 67/54Rb Addiator Darmstadt Rule. Ends Friday November 27th!

November 18, 2015
More GOODIES added to the annual
Slide Rule Food Bank Auction
Have a Look!!

Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
20 inch rule, CLICK to SEE!
CLICK to See!

CLICK to see all the amazing auction items, including a Pocket Final Deci-lon and FC 4/87 20 inch rule. Ends Friday November 27th!

November 15, 2015
The annual slide rule food bank auction
STARTS TODAY!!

Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to SEE!

CLICK to see all the amazing auction items, ends Friday November 27th!

November 8, 2015 New Pocket + Full Sized Rules just arrived!

CLICK to SEE!
New Aristo 0803 boxed pocket rule sets!

9 Scale Rule
6 ScaleRule
Logarex 27401-X!
Lots of NEW cheap pocket and full sized rules in time for Christmas!

Over 150 new slide rules just added, have a look!
May 12, 2015
120ES, CLICK to SEE
New Pickett 120ES boxed Student rule sets!
After a YEAR LONG WAIT, we have more stock of these
very popular 10 inch Student rule sets!

Sparkly new Eye-Saver (ES) Yellow student rule sets!
February 15, 2015
CLICK to see!
New K+E boxed pocket rule sets!

CLICK to see!
New 7 Inch Circular Datalizer Date Finders

New desk-sized date finders!
December 14, 2014
CLICK to see!
New Hughes Owens 1762 (POST 1444) Pocket rules sets from (wait for it) 1955!

Plus we have the incredibly rare 1957 Hemmi illustrated books to go with them!
November 21, 2014
The annual slide rule food bank auction
ENDS TONIGHT, 9PM!!

Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to see!
CLICK to see all the auction items, ends TONIGHT November 21st!

More goodies added, and don't forget the SECRET action item!
November 17, 2014
The annual slide rule food back auction is now OPEN!!
Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to see!
CLICK to see all the auction items, ends THIS FRIDAY, November 21st!

Just added an ELECTRONICS Slide Rule Assortment! Have some fun and do some good all at the same time!
November 6, 2014
The annual slide rule food back auction is now OPEN!!
Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to see!
CLICK to see all the auction items, ends November 21st!

We will be adding items daily, from the amazing Pickett Bat Case N3ES to a giant assortment of Slide Charts! Have some fun and do some good all at the same time!
November 1, 2014
WOW, HUNDREDS of BRAND NEW Low Cost Rules
Just in time for Christmas!


CLICK to see!
CLICK to see!
CLICK to see!
CLICK to see!
CLICK see!

CLICK to see all the new low cost rules, is this fun or what? The slide rule elves have been very busy.

We got in hundreds of new rules and boxed sets, great for first rules and students. This is the first big cache of new rules we have gotten in over a year, so have a look!
June 6, 2014 NIB Pickett Sets
CLICK to SEE!
CLICK For Many new Pickett sets!

We just added all kinds of new Pickett sets! Have a look.
NIB Low Cost Pickett Sets
CLICK to SEE!
CLICK For Many new Pickett low cost Student sets!

Even 115 sets that can add and subtract! Have a look.
NEW Foxboro Flow Rule Set
CLICK to SEE!
CLICK a NEW complete Foxboro Flow rule boxed set with Manual!

Very rare find!
June 1, 2014 Giant Gilson Binary Circulars!
CLICK to SEE!
CLICK For Gilson Binaries

We have been out of stock for a while, here's two great sets!
April 27, 2014 NEW BOXED K+E Pocket Sets!
CLICK to SEE!
CLICK For new boxed K+E Sets

Just got in a nice selection of hard to find K+E boxed sets, great grad gifts!
January 22, 2014 EXcellent Geotec Versalog II Sets!
CLICK to SEE!
CLICK For Geotec Versalog II Sets

Just got in 5 excellent sets, with leatherette cases!
January 22, 2014 NEW Geotec Versalog II Sets!
CLICK to SEE!
CLICK For New Geotec Versalog II Sets

Just got in a few new sets, with LEATHER cases!
January 6, 2014 NEW Boxed Faber-Castell 52/81 Novo-Mentor Sets!
CLICK to SEE!
CLICK For New Faber-Castell Sets

Just got in a few 52/81 boxed sets, complete with English manuals.
January 4, 2014 NEW Boxed N200ES Pickett Sets!
CLICK to see!
CLICK For New Pickett Sets

Just got in a few more N200ES boxed sets, have black leather slip cases with extractors.
January 1, 2014 NEW Circular Slide Rule Sets!
Model 250, CLICK to see!
CLICK For New Circular Pocket Sets

Hard to find SINCO Model 250 boxed sets.
Very high resolution trig rules!
December 11th, 2013 NEW Pocket Slide Rule Sets!
Hemmi 34RK set, CLICK to SEE
CLICK For New Pocket Sets

Hard to find NEW BOXED Hemmi 34RK sets.
great christmas gifts and ON SALE for the holidays!
October 5th, 2013 NEW Pocket Slide Rule Sets!
CLICK to SEE!
CLICK For New Pocket Sets

NEW Cheap Pocket Slide Rules!
CLICK to SEE!
CLICK For New Cheap Pocket Slide Rules

All kinds of new pocket slide rules from $9 to $59! Perfect Stocking Stuffers and carry rules!
September 12th, 2013 NEW Boxed Pickett Sets!
CLICK for New Boxed Pickett Sets
CLICK New Boxed Pickett Sets

We have some new N1010-T, N1010SL-ES, N200ES and N300ES sets.
Just a few, but in time for school or christmas!
September 12th, 2013 HALF OFF Sale on 700T Pocket Rules!
N700T Set, CLICK to SEE!
Sale!Sale!Sale!
CLICK New Boxed Pickett 6700T Pocket Sets

Great pocket Trig rules with leather pocket cases at a GREAT Price, perfect for Christmas treats for your slide rule friends, and they can do arial photo scaling on the flip side, for those sudden airborne photo emergencies!
November 23, 2012 Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to SEE!
More Goodies Added To The Auction!
Visit the 10th Annual Food Bank Slide Rule Auction!
November 20, 2012 Go to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction PageGo to the Auction Page
CLICK to see!
The Auction is OPEN!
Our 10th Annual Food Bank Slide Rule Auction is NOW OPEN!

Check the page often to see regular additions!
Closes Friday, November 30th at 9PM PST.
November 16, 2012 MORE LOW COST TREATS!
CLICK TO SEE!
Just in, one bulk batch of new Pickett Model 80 Student rules. Our lowest cost new slide rule yet! Stock up while we have them.
July 16, 2012 SUMMER TREATS!
CLICK to SEE!
Just in, factory boxed Picket 140T Log Log Sets!

New in the box, complete with manual and case! Great higher end school sets with a powerful Log Log scale assortment. We have been out of these for a LONG TIME! Stock up for September back to school!
June 28, 2012 SUMMER TREATS!
Ricoh 105P Set, CLICK to see!
Just in, factory boxed Ricoh 105P Rules!

New in the box, complete with manual and case! Great desk sets to leave out for everyday use with cm and inch rulers added to the slide rue design.

RICOH 505LA, Click to SEE!
Found in our wayback machine, 3 More Sets!

Beautiful pocket bamboo slide rule sets!
June 11, 2012 SUMMER TREATS!
120ES, CLICK to SEE
Just in, another batch of ever-popular Pickett 120ES Student Rules!

New in the box, complete with manual and case!

CLICK to SEE
Just in, 2 more Giant 20 Inch Faber 4/98 Elektro Sets!

New sets, very hard to find these gigantic rules, especially in new condition!
June 2, 2012 SUMMER TREATS!
CLICK to see
Just in, New SKALA pocket rules with leather cases!

Beautiful pocket rules from POLAND, first time on our site!
May 20, 2012 New Boxed versalog 2, CLICK to see
Just in, a NEW, BOXED Teledyne Post Versalog II!

Also the matching NEW BOXED Pocket versalog II HERE!
May 20, 2012 K+E Sets, CLICK to see!
Just in, a rare batch of NEW, BOXED K+E Full Sized Sets!

We got some final inventory from a stationary store, lost for decades, just a few different sets, but YES, there's two Cooke Radio rules!!
May 20, 2012 K+E Pocket Sets, CLICK to see!
Just in, a rare batch of NEW, BOXED K+E Pocket Sized Sets!

We got some final inventory from a stationary store, lost for decades, there are some very nice pocket sets too!!
May 17, 2012 CLICK to see!
Take a huge sale discount of NEW boxed sets of Pickett N1010SLT rules that have scruffy boxes.

We have one batch of them, when they are gone, that's it! Includes Manual, Warranty card, and Leather Case!
Check the bottom of the page for the sale sets!

CLICK to visit the Slide Rule Marketplace
Click to visit!
CLICK HEREBuy a slide rule from our extensive on line marketplace, with restored classics, amazing new in the box rules, and low cost first student rules. We have something for everybody, even a swap and sell area for visitors.
CLICK to Learn about your slide rule!
Click to visit!
CLICK HERELearn to operate and care for your slide rule with these on line manuals and directions. Learn what scales mean, how to use them and how to restore or keep your rule in good condition.
CLICK to visit the Slide Rule Archives!
Click to visit!
CLICK HERETour our extensive archives of slide rule manufacturers and models from all over the world. Find out who made what, and what became of them after they stopped making slide rules. See how slide rules survive today in the form of slide charts still made in the millions annually.
CLICK to visit our LINKS
Click to visit!
CLICK HEREVisit other slide rule places on the web with more slide rule data and information. From personal collections on line to (yes, it's really true) the international slide rule owners and collectors organization, the Oughtred Society.
CLICK to visit the Marketplace
Click to visit!
CLICK HERENice things people have said about us in print and on TV, see the original articles. We always appreciate it!
CLICK to visit the Test Equipment Site!
Click to visit!
CLICK HEREVisit our TEST EQUIPMENT site everything from Scopes, CRT's and DMM's to nixie tubes, HP and Tektronix spare parts. A little electronic something for everybody.
E-mail us Created by the ad hoc Godzilla Graphics Group You are visitor number dot127149dot.
Site Design & contents copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010, 2012, 2013, 2014, 2015, 2016
by Walter Shawlee 2 & the ad hoc Godzilla Graphics Group.


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