Rare SLIDE RULER FOR Calculations Reis of Germany DDR – Darmstadt Read Further

Ruler is in almost new condition and in original blue poach. A real collectors piece, made in Darmstadt, Germany DDR. The slide ruler became largely obsolete during 1974 with the introduction of today’s  electronic scientific calculator. In centimeters. (Offered on another website for R320) Postage R30 registered mail