Hyperbolic Match Output

Number:99

Maker:SIDA (China)

Model: No. 1002

Scales Front: || Ln1I, Ln2I, Ln3I, DF || CF, CIF, H1, H2, CI, C || D, Ln₃, Ln₂, Ln₁|| CF is folded at √10

Scales Back: || sh1, sh2, K, A || B, sincos, H', tgctg, tgctg, C || D, DI, lg, th ||

Gauge Marks: π is on A, B, C, D, and DF. Marks 1° and R are on back scales C and D; π/4 is on A and B; v is on K.

Cursor Front:

Cursor Back: has line HP(**) on right over A and B scales.

Construction: 25 cm.; Plastic, Cursor is not framed. Adjustable metal brackets.

Date:

Source: Collection of Daryl Tang

Information: Similar to Flying Fish & Ruyi 1002 See 30, 92a.