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

Vintage ALVIN Triangular Drafting / Engineering Rulers / GERMANY

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

Set of 2 ALVIN 240B and 241P Architect Scale Drafting Triangular Rulers

3 Alvin Engineer Architect Drafting Triangular Rulers 110P, 111P & 740PM Tub15

Vintage Engineer Scale Ruler Lot Alvin Drafting Tool Set Wood

Alvin 240 P Architect Drafting 12” and Alvin 111 P Engineer 12” Scale

Set of 3 Alvin Architects Professional Engineer Plastic Triangular Scale-Germany