Dietzgen 1626 Wooden 3-Sided Triangular Ruler Scale Drafting Vintage USA 12" Woo

Wooden 3 Sided Triangle Drafting Ruler Engineer Vintage 12"

Dietzgen 1626 Wooden 3-Sided Triangular Ruler Scale Drafting Vintage USA 12"

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

Vintage 3 sided ruler --wood

Dietzgen Wooden 3 Sided Triangular Ruler Scale Drafting Vintage 31626 USA 12"

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