4.7 Hemmi, Japan

Hemmi Bamboo Slide Rule Company (also known as Sun Hemmi), Japan, was founded in 1894 and made roughly 15 million slide rules which were sold around the world, most notably by the Fredrick Post Co. in the U.S., by Hughes-Owens in Canada and by Tamaya & Company of Tokyo. The lists below show rules in the collection that were sold as “Hemmi,” sold as “Post” and sold as other brands.

Frederick Post could not sell Japanese rules during World War II, so for that period they obtained rules from other companies in the US. The collection has a large number of Post slide rules, mostly made by Hemmi, all of which can be found in the special grouping Frederick Post Rules.

Total number of Hemmi Bamboo Slide Rule Company slide rules in the collection: 32.

4.7.1 Exclusively Sun Hemmi

Hemmi 80/3 Electro.

Hemmi 257 Chemical (front)

Hemmi 257 Chemical (back)

Hemmi 153

Hemmi 153 (back)

Model Year Serial Typ Mat Size Case Note
153 1931-1934 L wd 10 yes Electrical Engineers Universal Duplex; vector rule; serif type, very early rule, in very nice condition
50/1
1935 L wd 10 no nice condition
80/3
1935 L wd 10 box Electro; tables on back and text on box in French
153
1938 L wd 10 yes Electrical Engineers Universal Duplex; vector rule; sans serif type; owner – Aurthur Stegelman worked for Halliburton; from his granddaughter; U.Oklahoma on case
255 1952 CB L wd 10 no Vector rule; for Expert Electrical Engineer
153 1955 FE L wd 10 box Electrical Engineers Universal Duplex; vector rule; sans serif type; nice condition but cracked cursor
257 1956 GD L wd 10 yes Chemical Engineering; owner Frank Banks of CA
30 1964 OE L wd 4 yes Hemmi on light brown leather case

4.7.2 Made for Frederick Post Co., USA

Post 1460 Versalog.

Versalog (side)

Model Year Serial Typ Mat Size Case Note
32 1936-43 L wd 4 yes + box Post 1441; references to Japan scratched out
40
1940 L wd 10 box Post 1446; newer cursor
32 1947-49 L wd 4 yes + box Post 1441; Made in Occupied Japan on inside of leather case and side of cursor
159 1949-51 L wd 10 yes + box Post 1462H; POSTRIG; nice condition but cracked cursor; replaced by Versalog
258 1951 BF L wd 10 box Post 1460; original 1460 box; first month for Versalog; no 258 on stock; 1951 1st edition Versalog book
258 1952 CL L wd 10 yes Post 1460; case minus flap; Bruce G. Shaw
258 1953 DC L wd 10 yes Post 1460; leather stitched case; D.P. Hoose
40RK 1954 EA L wd 10 box Post 1447
32 1957 HJ L wd 4 yes Post 1441
258 1957 HE L wd 10 yes Post 1460; case in nice condition; serial 821829
258 1958 IL L wd 10 yes Post 1460; case in very nice condition
50W 1959 JB L wd 10 box Post 1452W; Universal; nice condition; Feb 1959
S40RK 1962 MK L wd 10 box Post 1447S
258 1963 NJ L wd 10 yes Post 1460; black case
Pocket Versalog 1965 PG L wd 5 yes + box Post 1461; variant 1b (cos in green); leather case, original box, fact sheet
40RK 1966 QJ L wd 10 yes Post 1447; plastic case; instructions
258 1966 QH L wd 10 yes Post 1460; case in very nice condition
258 1967 RD L wd 10 yes Post 1460; leather stitched case; K. Stegelman – from daughter
45K 1968 SG L wd 10 yes Post 1445, with 3-ring binder sleeve
Pocket Versalog 1968 SB L wd 5 yes Post 1461; variant 1b (cos in green); brown leather case
258 1971 VF L wd 10 yes Post 1460 Versalog II, green COS, leather case with clip; came with Versalog II Slide Rule Instructions book
258 1972 WF L wd 10 yes Post 1460 Teledyne 44CA-600 Versalog II, green COS, never used (came in original plastic)

4.7.3 Made for Others

U.S. Blue 1876.

Hughes Owens 1771.

Model Year Serial Typ Mat Size Case Note
40
1930 L wd 10 yes US Blue 1876; retracting magnifier
50W 1953 DF L wd 10 no Hughes-Owens 1771; nice condition; June 1953; table of constants etc absent from back panel