Hyperbolic Match Output
Maker:HANGZHOU JIANG SHI YI XING (China)
Construction: 25 cm.; Photo plastic face on wood; Cursor is not framed. Is not duplex; no scales or cursor on back side.
Information: This has same scales as JIANG 6171 (Pat. 129). Probably same slide rule, but with different cursor See 51. Cursor : Has two lines over C, D, CI, LL2, and LL3; with left line over 1, center line is over 1.19, and right line over 1.341.