VINTAGE TRIANGLE 3 SIDED RULER GRAMERCY GENUINE BOXWOOD MADE IN WEST GERMANY

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

Alvin Triangle Ruler No 241P

Vtg Alvin No. 111P Triangle 3 Sided Drafting Engineer Ruler MADE IN GERMANY

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

Vintage Pearwood Alvin No 210 USST'D Triangle Ruler Made in West Germany

Vintage Alvin No. 241 P Engineer Triangular 12" Scale

VINTAGE-ALVIN ENGINE DIVIDED-No 267-2 SIDED RULER-U.S. ST’D-W.GERMANY Boxwood