Chemical Match Output

Number:22b

Maker:Hemmi Metal Chemistry Rule II
PHOTO

Length: 50 cm

Gauge Marks:

Scales Front: L K A DF = CF CIF CI C = D^oK LL3 LL2 LL1

Scales Back: Chemical Scales

Info: Atsushi Tomozawa Collection
Mentioned in the Paul Ross Hemmi Slide Rule Catalogue Raisonné Part II Rules Without Known Model Numbers.
Two specimens of this rule are known; neither has a date code. Atsushi Tomozawa purchased the rule pictured here along with a Japanese language instructionmanual directly from Hemmi about 2004. The Hemmi employees he dealt with identified it as a "Metal-Chemistry" rule. (D. Boone owns the other specimen.) Based upon its similarity to the Hemmi Chemistry rule (model 257L) it is possible that this rule was intended to be marketed as mode l277 but no such model number appears in anyknown Hemmi documentation.