Vintage Staedtler Mars 964 51-10 Adjustable Triangle Rise/Slope /Degrees+ Rulers

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

Staedtler Mars Adjustable Triangle 964 51-8

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

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

Staedtler Mars 964 51-10 Adjustable Triangle Rise/Slope /Degrees+ Ruler VTG

STAEDTLER MARS 8” Adjustable Triangle 964 50-8 USA

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