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

Vintage The C-Thru Ruler Co USA Drafting Tool Adjustable Parallel 15" Line Bar

C-THRU Metric Ruler M-107 made in usa Centimeters Millimeters

The C-Thru Ruler Co USA Vintage Drafting Tool Adjustable Parallel 15" Line Bar

C-THRU M-100 Engineering Ruler made in usa

The Perks C-Thru Ruler USA Vintage Drafting Tool Adj. Parallel 15" Line Bar +Box

The C-Thru Ruler Co USA Vintage Drafting Tool Adjustable Parallel 12" Line Bar