Vintage W.H.H.L.D. 6 Inch Hinged Parallel Ruler Brass and Plastic Drafting Tool

Vintage Drafting Scales Lot of 16 Parallel Rulers Universal Drafting Machine Co

The C-Thru Ruler Co 15” Adjustable Hinged Parallel Line Drafting Rule Tool

The C-Thru Ruler Co USA Vintage Drafting Tool Adjustable Parallel 15" With box

Rare Complete Set Vintage Eugene Dietzgen Scale Rulers for Architecture/Drafting

Vintage Mayline Drafting Mechanical Parallel Line Ruler 24 inch

Vintage 12" W H Harling Parallel Rolling Rule Ruler w/Case Drafting Charting

Keuffel Esser Co Drafting Ruler Paragon Triangular Vintage Assorted Lot Boxwood