Cordys

A 15-inch ebony parallel rule

Estimate: $90 - $150


Lot Description

A 15-inch ebony parallel rule, marked 'W.H. Harling Ltd., 117 Moorgate, London', outer edges divided into degrees, opposite edge divided into points, half-points and quarter-points (Field's design), with brass hinges. 19thC. Provenance: The H.N.E Sheppard Estate Collection.