The Keuffel & Esser Doric Triangular Architects Scale Ruler is a vintage drafting tool used by architects and engineers. Known for its precision and durability, this scale ruler is a rare collectible piece that showcases the quality craftsmanship of Keuffel & Esser. With its unique triangular design, this ruler allows users to accurately draw and measure complex architectural designs with ease. It is a must-have for any drafting enthusiast or collector of vintage engineering tools.plastic great shape.

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