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

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

Alvin 12” Triangular Scale Ruler No. 110P Architect Drafting Germany

Alvin 3 Sided Engineer Scale No 119 PC Triangular Drafting Ruler W-Germany

VINTAGE ALVIN DRAFTING SCALE MAP MEASURE OPISOMETER - MADE IN GERMANY (h12)

Alvin Ruler, 12" Wood/Plastic Drafting/Engineers 2-Scale, Boxwood, West Germany

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