Hyperbolic Match Output

Number:37d

Maker:Gong Si He Ying Jiang's (Jiang Shi)

Model: Type YI(B)

PHOTO

Scales Front: || LL1, CU (L), R, T CT || B, S CS, SH, SHθ/θ, ΔH, THθ/θ, CI, C || D, LL2, LL3

Scales Back:

Gauge Marks: π

Cursor Front:

Cursor Back:

Construction: 25cm.; Cursor: Aluminum framed with glass lens, single hairlines.

Date: 1960

Source: ISRM and Steve Searle

Information: Made in China by ,Gong Si He Ying, Hangzhou Stationery Factory.. Designed by Deyao Jiang. Front has Pat.129