Alvin 110-P Triangular 12" Architect Scale (West Germany)

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

Alvin 240-P Triangular 12" Architect Scale (West Germany)

Vintage Alvin Triangular Architectural Drafting Ruler No 110P Made W. Germany

ALVIN Architect Triangular Scale Ruler 12" Model 110P White with

Vintage Alvin No. 240x Boxwood Ruler 12" Engineer/Architect West Germany

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

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