CASTELL MAKE 12" SLIDE RULE IN AN EXCELLENT OLD REAL LEATHER CASE.

Vintage TRANSFORMING COMPASS DIVIDERS PEN SET by American Pencil Co. 4½" in Case

COMPREHENSIVE CASED VINTAGE TECHNICAL DRAWING DRAFTING COMPASS SET

6" Brass Drafting Tool Proportional Divider Compass Scientific Instrument

Vintage PROPORTIONAL DIVIDERS BRASS & STEEL W & D Ltd. BOXED 1900s Original Box

Antique Brass Drafting Tool Proportional Divider Compass Scientific Instrument

Antique Early W F Stanley & Co London Drawing Drafting Surveying Instruments

Antique Brass Drafting Tool Proportional Divider Compass Scientific Instrument