Set Of ALVIN 240P & 241P Architect & Enginer Scale Drafting Triangular Ruler

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3 Triangular Scale Alvin 241 244B Pickett 234E Rulers 3 Side Architect Engineer

Vintage Alvin No 240P Triangular Architect Scale Ruler 12 Inch Made in Germany

VTG West Germany Alvin 240 P Architect Drafting 12” Triangular Scale Ruler 5799

2 VTG Triangle Alvin 240P, Koh-I-Noor Rulers Architect Germany Engineer Drafting