Hyperbolic Match Output
Maker:NIKKEI (JAPAN Nippon Slide Rule Co.)
Model:NIKKEI 520 Duplex
Scales Front: || L, K, DF || CF, CIF, CI, C || D, X, Θ || Note: X is radians; Θ degrees
Scales Back: || Sh1, Sh2, Th, A || B, T, S, ST, C || D, LL1, LL2, LL3 ||
Information: Do not have a picture or manual for this slide rule. Hopp does not list it. Need complete information with listing of details of scales, gauge marks and cursor lines.