 Model Number  
Type 
Length 
Material 
Front 
Back 
Dates 
Comment 
Catalog Number and Name
Names in italics actually appear on the rule.
Other names are common usage or taken from catalogs.
Post brand slide rules are usually labeled with model number and the Post trademark or Frederick Post Co. 
Type:
Mannheim Duplex Simplex Circular Etc.
Simplex means a duplex rule that has no calculating scales on the backs of the stators. 
Nominal Length in Inches
(Most 10inch slide rules have scales that are actually 250 mm longslightly shorter than 10 inches.) 
What the rule is made of, such as wood, plastic, unobtanium, etc. 
Scales on Front
For mannheim rules only, this also includes any measuring scale on top edge set off with // or . 'cm //' indicates a centimeter scale on a slanted surface; '0 ' indicates a vertical surface with no scale. 
Scales on Back
For mannheim rules only, this also includes any measuring scale on bottom edge set off with // or .
Measuring scales are given wherever they are known. If nothing is shown, scale is not known. 
Our guess about when the rule was made or available. If we have only one reference, that date is given. 
Other interesting information such as original catalog price, what rule it was made from, or is similar to, etc. 
1431
Post Adjustable

Mannheim 
5 
Celluloid Mahogany 
cm // A [B, C] D 

1910 
Catalog illus marked Dennert & Pape. $3.50. 
1432
Post Adjustable

Mannheim 
10 
Celluloid Mahogany 
cm // A [B, C] D 

1910 
10inch version of 1431. Dennert & Pape. $4.25. 
1433
Post Adjustable

Mannheim 
20 
Celluloid Mahogany 
cm // A [B, C] D 

1910 
20inch version of 1431. Dennert & Pape. $12.50. 
1434
Post Engineer's

Mannheim 
10 
Celluloid Mahogany 
cm // E, A [B, C] D, F 

1910 
E is log scale, F is cube scale. Dennert & Pape. $5.00. 
1435
Post Eureka

Mannheim 
5 
Celluloid Mahogany 
cm // L [?, BI, CI] DF These scales uncertain 
[KI, BI] These scales uncertain 
1910 
'Direct reading of three halves and two thirds powers.' Dennert & Pape? $3.00. 
1436
Post Eureka

Mannheim 
10 
Celluloid Mahogany 
cm // L [?, BI, CI] DF These scales uncertain 
[KI, BI] These scales uncertain 
1910 
10inch version of 1435. Dennert & Pape? $3.50. 
1437
Post Nautical

Mannheim 
10 
Celluloid Mahogany 
27 cm // 1 num [2 num, 3 winkel] 4 log 
'sines, cosines, and tangent table' 
1910 
Dennert & Pape? $5.50. 
1437
Richardson's Direct Reading Metal Slide Rule 10inch Mannheim

Richardson 
10 
Metal 
SIN, A [B, C] D, TAN, LOG 
None 
1921 

1437A
Richardson's Direct Reading Metal Slide Rule Pantocrat Mannheim

Richardson 
10 
Metal 
SIN, A [B, +/, C] D, TAN, LOG 
None 
1921 
Addition and subtraction scales. 
1437B
Richardson's Direct Reading Metal Slide Rule Polymetric

Richardson 
10 
Metal 
SIN, A [B, CI, C] D, TAN, LOG 
None 
1921 

1437C
Richardson's Direct Reading Metal Slide Rule Binary Polymetric

Richardson 
10 
Metal 
SIN, A [C, CI, R] D, TAN, LOG 
None 
1921 
R scale divided in fractions. 
1437
Post FourInch Mannheim

Mannheim 
4 
Celluloid Bamboo 
4 in  A [B, C] D 
[S, L, T]  10 cm 
1936 
1440 w vertical top edge. Also labeled Hemmi 35. 
1438
Post Logarithmic

Mannheim 
10 
Celluloid Mahogany 
?, ?, A [B, C] D, ? 

1910 
Weight of sheet iron, pipes, bars, etc in one setting. Dennert & Pape? $6.50. 
1438
Post FiveInch Mannheim Multiphase

Mannheim 
5 
Celluloid Bamboo 
A [B, CI, C] D 
[S, L, T] 
1936 
Hemmi 34R. 
1439
Vicari's Sewer Slide Rule

Mannheim 
10 
Celluloid Mahogany 
cm // Four scales 

1910 
Direct calculation of circular or eggshaped sewers at any water level. $5.50. 