Hyperbolic Match Output
Maker:HAIOU PAI (China)
Model:No. 6681 Haiou (Seagull)
Scales Front: || LL01, LL02, LL03, DF || CF, CIF, H, CI, C || D, LL3, LL2, LL1|| CF is folded at π
Scales Back: || L, Sh1, Sh2, A || B, T&T, ST, S&S, C || D, P, Th, Ch ||
Gauge Marks: π is on A, B, C, D, CF, DF, CI, and CIF; ' and " are on ST.
Cursor Front: : There is a mark on the right over the CF & DF scales for mutiplication of C and D by 36.
Cursor Back: Has marks HP(**) at right , and π/4 on left over the A and B scales. On right over C and D scales is √4/π
Construction: 25cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets on one side only.
Source: R.H. and WKR
Information: (see Number 9a on list)