Eugene Dietzgen Co Engineering Scale Drafting Ruler Sets Wooden Case Vintage USA

Multi-Purpose Drawing Parallel Rolling Ruler 12 Inch Drawing Design Ruler in Box

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

The C-Thru Ruler Co USA Vintage Drafting Tool Adjustable Parallel 15" In Box

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

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

Vintage Mayline Drafting Mechanical Parallel Line Ruler 15"

Alvin - Parallel Rolling Ruler 6 inch #306 - New in Box - Taiwan - vtg