Vintage Navigator / Architect / Drafting Parallel Ruler

Vintage NOS A&W Brass Protractor USA 180 Degree Ruler Drafting Tool C1

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

Vintage Brass Protractor USA 180 Degree Ruler Drafting Tool Measurement Antique

VTG The C-Thru Ruler Co. 12” Hinged Parallel Drafting Ruler Bloomfield Conn. USA

Vintage Hinged Parallel Ruler Drafting Tool 12"

Vintage 12" Wooden Desk Ruler with Brass Edge - Made in USA - Drafting Tool

Vintage 12" Rolling Parallel Ruler Professional Drawing Tool as Seen on TV