Engineer Triangular Scale 12" Ruler with Etched Marking made in Japan

Vintage Ford Metric Machine Drafting Ruler 1/2mm Scale 300mm Double-Sided Metal

Vtg Compass 1250 West Germany Plastic Ruler Triangular Arc Metric Scale F5

Vintage K&E Doric N8881 Triangular Architect Scale Ruler - Engraved Initials

3 Vintage Triangular Scale 3 Sided Drafting Drawing Engineering Rulers

Alvin Professional 12" Triangular Drafting Architects Scale Ruler 240p, in Case

Alvin Drafting Ruler Model 250x West Germany-Set Of 2 -J

Vintage Bruning "Perspective-O-Metric" drafting instrument i