Rare, Inglis Engineers Slide-Rule & Ready Reckoner, Antique, Poor Cond'n (A1080)

Vintage Rolling / Parallel 18 inch Rule

Antique ebony and brass parallel rule for navigation/drafting

Antique Ebony and Brass Parallel Ruler. M.K

ANTIQUE EBONY WOOD PARALLEL RULE MEASUREMENT TOOL

Antique Ebony & Brass Parallel Gauge With Unis France Mark Maritime Draughtsman

Vintage Ebony & Brass Parallel Rule 385MM

Vintage 1963 London Parallel Rule Ebony & Brass Draughtsman Tool