Folding Parallel Rule C-Thru Ruler Company 1500 - 12 inches in Box

C-THRU RULER COMPANY FOLDING PARALLEL RULE 1500-12 INCHES WITH ORIGINAL BOX

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

C-Thru 1500 15" Folding Parallel Rule with Original Box

The C-Thru Ruler Co. 24 inch Folding Parallel Rule. Vintage

C-THRU Folding Parallel Rule 1500 - 12 Inch Drafting Ruler New Old Stock w/ Box

C-THRU FOLDING PARALLEL RULE, MODEL 1500-12