Alvin No 111 P Triangular Engineer Scale 12 Inch White Drafting Ruler Vintage Alvin No. 111 P triangular engineer scale offers professional-grade precision for drafting and graphic art supplies. Made in W. Germany, this 12-inch white plastic ruler features multiple scales including 10, 20, 30, 40, 50, and 60 parts to the inch. The triangular design allows for easy selection of the desired scale, while the high-impact material ensures durability for long-term use in engineering or architectural projects. It comes with its original clear plastic protective sleeve featuring the blue Alvin branding. A bit of yellowing from age-See photos. Measurements: • Length: 12" • We ship same or next day • All items come from a clean, pet-free, smoke-free home. #Retro #Neutral