Hyperbolic Match Output

Number:21a

Maker:DIETZGEN (USA) Vector Type Log Log

Model:No. B-1725? (Made in USA)

PHOTO

Scales Front: || Th, Sh2, Sh1, A || B, T<45°&T<45°, T>45°&T>45°, ST, S&S || D, DI, K||

Scales Back: || LL01, LL02, LL03, DF || CF, CIF, L, CI, C || D, LL3, LL2, LL1||

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.

Cursor Front:

Cursor Back:

Construction: 25 cm.;Plastic face on laminated wood ;Cursor metal framed. Adjustable metal brackets.

Date: 1972

Source: ISRM

Information: