Vintage Staedtler Mars Adjustable Triangle w/ Slope and Rise NIB 964-51-10

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

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 8” Adjustable Triangle 964 50-8 USA

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

Staedtler Mars 8" Adjustable Arithmetic Triangle 964 50-8 W/ Slope & Rise + Box

Vintage Mars STAEDTLER Triangle 966 10-60 11.5 x 5.5