Manufacturer: Sun Hemmi
Country of Manufacture: Japan
Type: 255D
Number: Y1
Date of Manufacture:  
Scales: (Front) Sh1, Sh2, Th, A [ B, TI2, TI1, SI, C] D, DI, radians, theta
Scales: (Back) L, K, DF [CF, CIF, CI, C] D, LL3, LL2, LL1
Number of Scales: 24
Gauge Points: π, C, q', e
Slide Rule made from: Bamboo and Plastic
Cursor made from: Plastic
Cursor Lines: 1 front, 1 back
Overall Length of Rule: 32.1 cm
Length of Scales: 25 cm
Width: 4.5 cm
Depth: 0.7 cm
Weight: 137 gm
Acquired from: Ted Hume
Date: Jan 2001
Condition: Good
 Leather case. Good condition
 JOS Vol 9, No. 2
 "The Sun Hemmi System of Trigonometric
 and Hyperbolic Scales"
 Borchers and Cotter