Hyperbolic Match Output
Maker:DING FENG (China)
Scales Front: || LL1I, LL2I, LL3I, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1||CF and DF are folded at √10
Scales Back: || Th, L, K, A || B, S&S, H', T&T, C || D, DI, Sh2, Sh1 ||
Gauge Marks: π is on A, and B back scales; and C, D, and DF front scales; The marks 1 °and R are on back scale C; mark v is at 4π/3 on K
Construction: 25 cm; Plastic face on wood ;Cursor is not framed; Adjustable metal end brackets.
Source: R.H. and WKR