Vintage ALVIN Triangular Drafting / Engineering Rulers / GERMANY

Alvin 744PM Drafting Engineering Triangular Square w/Case West Germany Vintage

Vintage ALVIN and Intertech German Made Drafting Compass Set w/ Case Engineering

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

Alvin 244B Drafting Engineer Scale 12” Triangular Ruler W/Case Bamboo Japan Used

Vintage Alvin Triangular Drafting Graphic Ruler, With Case, Germany, 744PM

Alvin 12" Triangular Drafting Architects Scale Ruler 247, in Case, Boxwood

Alvin 744PM Drafting Engineering Triangular Square w/Case West Germany Vintage