Hyperbolic Match Output
Maker:DIETZGEN (USA) Vector Type Log Log
Model:No. N1725 Microglide
Scales Front: || LL01, LL02, LL03, DF || CF, CIF, L, CI, C || D, LL3, LL2, LL1||
Scales Back: || Th, K, A || B, T1, T2, ST, S || D, DI, K||
Gauge Marks:Gauge Marks: π is on A, B, CF, and DF; π/4 is on A and B scales; The marks 1°, ' and " are on scale ST.
Construction: 25 cm; Plastic face on wood ;Cursor has metal frame. Adjustable metal end brackets.
Date: 1959 - 72