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2 Vintage Triangular Scale Ruler Dietzgen 1626 and Defiance 1881

Vintage Dietzgen No. 31626 Wooden 3-Sided Triangular Scale Ruler--for drafting

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Vintage Eugene Dietzgen Co. 1626 Triangular Divided Architect's Scale Ruler

Vintage Lietz 2322-S Pearwood 3 Sided Wooden Ruler

3-Sided Wood Ruler with Case, Vintage - U.S.ST'D - Engineer, Architect, Drafting

VINTAGE TRIANGLE 3 SIDED RULER MADE IN WEST GERMANY Lietz No. 2302-S Wood