Hyperbolic Match Output


Maker:DING FENG (China)

Model:No. 5471


Scales Front: || 2D, L, K, A || Tan&Cot, Sin&Cos, H', CI, C || D, Th, Sh1, Sh2 ||

Scales Back: || LL1I, LL2I, LL3I, DF || CF, CIF , H, CI, C || D, LL3, LL2, LL1|| CF and DF are folded at π

Gauge Marks: On front C scale is the mark R.

Cursor Front:

Cursor Back:

Construction: 25 cm; Plastic face on laminated wood ;Cursor is framed and has a notched wheel for fine adjutment.



Information: Collection of Daryl Tang