Vintage Staedtler Mars Adjustable Triangle with Slope & Rise 964 50/10

Vintage STAEDTLER Mars 964 51-10 Adjustable Triangle with Slope & Rise Drafting

Vintage Staedtler Mars Adjustable Triangle with Slope & Rise 964 50/10

(O) Staedtler Mars 964 51-8 Adjustable Triangle w/ Slope & Rise in Box U.S.A.

Vintage STAEDTLER Mars 964 51-10 Adjustable Triangle Drafting Ruler

Staedtler Mars Adjustable Triangle 964 51-8

STAEDTLER Mars 964 51-6 Adjustable Triangle Rise Slope Degrees

STAEDTLER MARS 964 09-45 & 964 10-60 Drafting Triangle Measuring Tool Vintage