Alvin No. 110P Precise Triangle Architect Drafting Scale Ruler West Germany 12"

Vintage ALVIN 12" Triangle Ruler #241B

Vintage Alvin No. 241 P Engineer Triangular 12" Scale

Alvin No. 110P Precise Triangle Architect Drafting Scale Ruler West Germany 12"

Alvin 3 sided Engineer Scale No 241P FREE SAME DAY SHIPPING

Vtg Alvin Triangle 3 Sided Engineer Ruler MADE IN GERMANY No. 241P

Drafting TRIANGULAR Rulers: 2 ALVIN No 241P & 240p Germany & 2 hardwood die

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