Antique ebony and brass parallel rule for navigation/drafting

ANTIQUE EBONY WOOD PARALLEL RULE MEASUREMENT TOOL

Vintage Ebony & Brass Parallel Rule 385MM

Vintage Set of Technical Drawing Tools, in Blue Velvet Lined Case

Vintage Drawing Instruments Set Compasses Protractor in Case - Z#1003

Capt Fields Pattern Parallel Navigation Ruler

Parallel Rulers Vintage Wood And Brass

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