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Hughes OwnesHughes-Owens / Geotec Company ArchivesGeotec
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Geotec Slide Rules
Models 341 3010 to 341 3690

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Hughes-Owens
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1778
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341 3010
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341 3738
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341 3690
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Geotec/HO 341-3215, CLICK for bigger PIC!
An interesting transitional set, showing the new Geotec case and logo, late model number (341-3215),
but the rule is still marked with the Hughes Owens logo.
Click to see a bigger view.


Model Number Date Description
Scales
Equivalents Comments
341 3010
1968+ 10" Versalog Ib, 23 scales

LL0 LL/0 K DF [ CF CIF CI C ] D R1 R2 L

LL/1 LL/2 LL/3 [ TT SecT ST CosS C ] D LL3 LL2 LL1
H-O 1777
H-O 341 3010
Post 1460
Versalog Ib, COS scale in green
341 3012
341 3012 (front), Click for bigger pic, browser BACK to return
341 3012 (back), Click for bigger pic, browser BACK to return
1968+ 10" Versalog II, 24 scales

LL/0 K A DF [ CF CIF CI C ] D R1 R2 L0

L LL/1 LL/2 LL/3 [ TT SecT SRT CosS C ] D LL3 LL2 LL1
Post 1460
T-P 44CA-600
Versalog II, with A scale
341 3050
1968+ 5" Versalog Ib, 23 scales

LL0 LL/0 K DF [ CF CIF CI C ] D R1 R2 L

LL/1 LL/2 LL/3 [ TT SecT ST CosS C ] D LL3 LL2 LL1
H-O 1778
H-O 341 3050
Post 1461
Pocket version of 341 3010
341 3052
1968+ 5" Versalog II, 24 scales

LL/0 K A DF [ CF CIF CI C ] D R1 R2 L0

L LL/1 LL/2 LL/3 [ TT SecT SRT CosS C ] D LL3 LL2 LL1
Post 1461
T-P 44DA-610
Pocket version of 341 3012
341 3215
341-3215, CLICK for bigger pic, Browser BACK to return

341-3215, CLICK for bigger pic, Browser BACK to return
1968+ 10" Mannheim, 9 scales

A [ B CI C ] D K

[ S L T ]
Hemmi 50W
H-O 1771
H-O 341 3215
Post 1452W
T-P 44BA-520
Universal Mannheim.
341 3425
1968+ 5" Mannheim, 9 scales

in // A [ B CI C ] D K

[ S L T ]
Hemmi 34RK
H-O 1762
H-O 341 3425
Post 1444RK
T-P 44DA-440
Pocket version of 341 3215
341 3526
341 3526 (front), Click for bigger pic, browser BACK to return
341 3526 (back), Click for bigger pic, browser BACK to return
341 3526 (slide back), Click for bigger pic, browser BACK to return
1968+ 10" student Mannheim, 9 scales

A [ B CI C ] D K

[ S L T ]
Hemmi 40RK
H-O 1768C
H-O 341 3526
Post 1447
US Blue 1877
Student version of 341 3215
341 3530
1968+ 10" plastic student Mannheim Hemmi P50D
Post 1447P
Hemmi
341 3630
1968+ 10" plastic student Mannheim, 9 scales

S K A [ B CI C ] D L T
unknown Not Hemmi
341 3645
1968+ 10" Darmstadt, 13 scales

T K A [ B CI C ] D L S ST

[ LL1 LL2 LL3 ]
Hemmi P280
T-P 1414
T-P 44BB-140
Only known Hughes-Owens or Geotec Darmstadt
341 3690
1968+ 10" plastic Versalog II, 24 scales

LL/0 K A DF [ CF CIF CI C ] D R1 R2 LL0

L LL/1 LL/2 LL/3 [ TT SecT SRT CosS C ] D LL3 LL2 LL1
unknown Unusual plastic Versalog II, made by Hemmi
Places to go in the Slide Rule Universe, people to see....

Archive Navigation, CLICK on the LOGO to Visit
Go to Hughes Owens

Hughes-Owens
1760
to
1778
Go to Hughes Owens

Hughes-Owens
341 3010
to
341 3738
Geotec

Geotec
341 3010
to
341 3690
COMING SOON



CLICK
to go to the
CATALOG
Archive
Go to the Sun/Hemmi Archive
HEMMI

CLICK
to go to the
Hemmi/Sun
Archive
Click to go to the Main POST Archive


CLICK
to go to the
POST
Archive
Go to the Teledyne Archive


CLICK
to go to the
Teledyne
Archive

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