3 Sided Ruler Triangular Scale Ruler for Architect Draftsman Student Engineer...

3 Sided Ruler Triangular Scale Ruler for Architect Draftsman Student Engineer Etc Vtg 60s EUC. Vintage 1960s 3-sided, 12" triangular ruler by Keuffel and Esser Co., made in the USA. White and dark green sturdy plastic. Gently used, may show slight discoloration in spots, tiny chips on 2 ends do not affect the overall useability of the ruler. Stored in a cool dry place. Comes from a smoke-free/pet-free home. Features: - Precision and Accuracy: 12" Triangular Architect's ruler features 3 sides with 6 different scales, Calculate dimension and perspective for plans and other blueprints without the guesswork. - Laser Etched: permanently etched numbers, characters and lines will not wipe or scratch off. - Perfect for a technical artist, architect, engineer, plan drawer, hobbyist, modeller, draftsman, graphic designer, student, etc. - Compact and lightweight, ideal for on-the-go use. Measures 13" long x 1" high on 3 sides. About Keuffel and Esser: Keuffel and Esser Co. (K and E), founded by German immigrants Wilhelm Keuffel and Hermann ­­Esser, was a prominent manufacturer of high-quality surveying, drafting, and calculating tools, particularly known for its slide rules and other drafting instruments, from 1867 to 1982. K and E manufactured a wide range of surveying, drafting, and calculating tools, including drafting kits, surveying instruments, slide rules, and more.