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

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

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

Adjustable Compass Ruler - Precision Circle Drawing for Woodworking & Drafting

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

New ESCO 18” Adjustable Metal Hinged Parallel Line Drafting Rule Tool

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

VTG The C-Thru Ruler Co. 15” Hinged Parallel Drafting Rulers Bloomfield Conn USA