AWESOME USER MADE BRONZE RIGHT ANGLE TRIANGLE

Found in a old toolbox. 14 3/16" by 11" by 10 1/16". Fashioned from an old brass sign. The only readable part of it is at the right angle which reads, "Patterson & Heward. Toronto" They apparently manufactured bronze tablets and signs ca 1884. 

https://luc.devroye.org/Patterson+Heward-ArtBrass+Bronze+Tablets+Signa-1917.pdf