Vintage Drafting Measuring Tool Lot Boltograph Nut Bolt Gauge Triangle Ruler

Vintage Drafting Measuring Tool Lot Boltograph Nut Bolt Gauge Triangle Ruler

Mixed vintage measuring and drafting tool lot including an early brass Boltograph patent pending drafting template, Work Shops nut and bolt gauge, clear drafting triangle and 30 centimeter ruler. The Boltograph was made by Dolgorukov Manufacturing Co. of Detroit and was designed for drawing and measuring standard nuts and bolts. Great mixed lot for machinists, engineers, drafting collectors, workshops or display.

Condition
Vintage used condition with scratches, discoloration, staining and general age related wear. All pieces sold together as shown. Please review photos.

Size
Four pieces
Largest ruler approximately 30 centimeters long
Drafting triangle approximately 19 centimeters long

Materials
Plastic, brass, metal

Colors
Brass, yellow, clear, white, blue

Estimated Age
Approximately 1940s to later twentieth century

Disclaimer: AI-generated images may appear at the end of the photo lineup for styling purposes only and may not exactly represent the item. Photos of the actual item are included. Vintage pieces may show age—please review all photos and details carefully.