5.16 Post, USA
The Frederick Post Company from Chicago was a major retailer of slide rules in the U.S. Their rules were sold under the Post name, but were produced by other manufacturers.16 Their earliest rules, from about 1900, were made by German companies such as KHH until 1931, and then by Hemmi in Japan. During World War II, the United States being at war with both of these countries meant that Post had to procure rules from US companies, such as Roos, and then re-brand and sell under the Frederick Post Company name. Following the end of the war, Post went back to obtaining rules from Hemmi in Japan until 1975. The Versalog, originally manufactured exclusively for Frederick Post by Hemmi, was designed by three professors at the Illinois Institute of Technology in Chicago, and became one of the premier slide rules sold in the U.S.
Below is a list of the 31 slide rules in the collection that were sold under the Frederick Post Company name, ordered by Year. A separate listing of Post Rules by Model Number is also available.
| Model | Maker | Year | Serial | L0 | Case | Note | |
|---|---|---|---|---|---|---|---|
| 1452 | KHH | 1924 | 10 | yes | Post 1452; very early version; maker Koch, Huxhold & Hannemann; Made in Germany in well; leather case, stamped Posts Multiphase Slide Rule; L scale right to left; Slide Rule Data Slips on back | ||
| 1452 | KHH |
|
1925-1930 | 10 | yes | Post 1452; maker Koch, Huxhold & Hannemann; Frederick Post Co. Chicago // Germany in well; fine leather case, stamped Posts Multiphase Slide Rule; owner M.J.T.; L scale right to left; Table of Constants The Frederick Post Company on back | |
| 1461 | Hemmi | 1936-1940 | 10 | yes | Post 1461 Electronic Engineering rule; elliptical Post logo (only Post with that logo); serif font; 1923 patent; owner Louis E. Herrington, Colorado | ||
| 1441 | Hemmi | 1936-43 | 4 | yes + box | Post 1441; references to Japan scratched out | ||
| 1446 | Hemmi |
|
1940 | 10 | box | Post 1446; newer cursor | |
| 1457 | Charvoz-Roos | 1942 | 10 | no | Post 1457; Mannheim-Trig; WW-II; rough condition | ||
| 1444 | Charvoz-Roos | 1944-45 | 5 | yes | Post 1444-D; pocket Commerce rule; nice condition; made during WW-II; clear celluloid cursor; red leather case; table of fraction conversions on inside of stock; clean table of Equivalents on back | ||
| 1442 | Charvoz-Roos | 1945 | 5 | yes | Post 1442; distinct C1/D1 C2/D2 scales | ||
| 1462 | Charvoz-Roos |
|
1945 | 10 | yes | Post 1462; brown leather case | |
| 1441 | Hemmi | 1947-49 | 4 | yes + box | Post 1441; Made in Occupied Japan on inside of leather case and side of cursor | ||
| 1462 | Hemmi | 1949-51 | 10 | yes + box | Post 1462H; POSTRIG; nice condition but cracked cursor; replaced by Versalog | ||
| 1444 | Bruning |
|
1950 | 5 | yes | Post 1444P made by Charles Bruning (on case), no text on back of rule; owner Richard Schroeder | |
| 1460 | Hemmi | 1951 | BF | 10 | box | Post 1460; original 1460 box; first year for Versalog; no 258 on stock; 1951 1st edition Versalog book | |
| 1460 | Hemmi | 1952 | CL | 10 | yes | Post 1460; case minus flap; Bruce G. Shaw | |
| 1460 | Hemmi | 1953 | DC | 10 | yes | Post 1460; leather stitched case; D.P. Hoose | |
| 1447 | Hemmi | 1954 | EA | 10 | box | Post 1447 | |
| 1441 | Hemmi | 1957 | HJ | 4 | yes | Post 1441 | |
| 1460 | Hemmi | 1957 | HE | 10 | yes | Post 1460; case in nice condition; serial 821829 | |
| 1460 | Hemmi | 1958 | IL | 10 | yes | Post 1460; case in very nice condition; owner Joseph A. Haertle, General Motors,co-author Computer Modeling in New Vehicle Design, Raymond G. Fischer and Joseph A. Haertle, SAE Transactions, Vol. 93, Section 4: 840772––841109 (1984), pp. 235-240. | |
| 1452 | Hemmi | 1959 | JB | 10 | box | Post 1452W; Universal; nice condition; Feb 1959 | |
| 1447 | Hemmi | 1962 | MK | 10 | box | Post 1447S | |
| 1460 | Hemmi | 1963 | NJ | 10 | yes | Post 1460; black case | |
| 1461 | Hemmi | 1965 | PG | 5 | yes + box | Post 1461; variant 1b (cos in green); leather case, original box, fact sheet | |
| 1447 | Hemmi | 1966 | QJ | 10 | yes | Post 1447; plastic case; instructions | |
| 1460 | Hemmi | 1967 | RD | 10 | yes | Post 1460; leather stitched case; K. Stegelman – from daughter | |
| 1445 | Hemmi | 1968 | SG | 10 | yes | Post 1445, with 3-ring binder sleeve | |
| 1461 | Hemmi | 1968 | SB | 5 | yes | Post 1461; variant 1b (cos in green); brown leather case | |
| 1460 | Hemmi | 1969 | TD | 10 | yes | Post 1460 Versalog II, green COS, plastic Post case | |
| 1460 | Hemmi | 1971 | VF | 10 | yes | Post 1460 Versalog II, green COS, leather case with clip; came with Versalog II Slide Rule Instructions book | |
| 1461 | Hemmi | 1971 | VD | 5 | yes | Post 1461; Versalog II, with A scale; leather case; brand new condition | |
| 1460 | Hemmi | 1972 | WF | 10 | yes | Post 1460 Teledyne 44CA-600 Versalog II, green COS, never used (came in original plastic) |
While not a “maker” of slide rules, Post is a significant enough retailer that it has been given its own section here.↩︎