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2 Vintage Triangle wood 12" rulers for drafting, architecture, engineering

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Vintage Alvin Architect Boxwood U.S.ST’D England Triangle Wood Ruler

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

Vintage Triangle Ruler: POST 7311 U.S.ST'D

Wood K&E Keuffel & Esser Triangle Scale Ruler Drafting 12" Length Vintage

Vintage Triangle Wood Wooden Engineer Ruler Made In West Germany From Boxwood