Very rare nautical slide rule made of plywood by A. M. Gordon, Glasgow, Scotland. With ‘scales of power & speed for proposed vessels on measured mile trials’ and ‘scale of IHP constant’ on the other side.

Catalog: NM.5-12
Date: ca. 1910
HWL: 0,5x34x9,5 cm
Signed: A.M. Gordon, M.I.N.A. Baltic Chambers, Glasgow
Origin: Scotland
Condition: perfect