Beautiful Old Heavy Brass Drafting / Carpenter's Triangle black jack An old school drawing I

An old school drawing I would guess

The head itself is painted a good dark green

He's made of clay

" "pools of light

Beautiful Old Heavy Brass Drafting / Carpenter's Triangle black jack An old school drawing ISo many beautiful tools in the world! (And I'm in the dark about how to use most of them!) I would guess this old brass triangle was used by a carpenter, or a framer (?), through would certainly look very lovely now sitting atop a pile of papers on a drafting table, or a studio table now. I especially love the the raised rectangle near the 30 degree angle, which would allow one to rest a ruler against it to draw a straight line in the opposite