Antique Parallel Ruler Ebony & Brass Drafting And Navigation Tool !

(Lot 23)- Vintage Keuffel & Esser Co. Natural Sines Compass.

Antique Ebony And Brass 21” Parallel Ruler Drafting And Navigation Tool

Vintage Keuffel & Esser Paragon Drafting Tools + Wood-Regan 2-Piece Ruler Set

Esco Parallel Ruler 15” Drafting Drawing Tool Engineering Navigation Architects

Palmer College Parallel #297M Chiropractic Tool, rolling ruler, metal

parallel rolling ruler

Alvin No. 298 Metric Parallel Glider Rolling Ruler Architecture Drafting Vtg.