7202-228 DARLING & SCHWARTZ try square. Patented 1857 by Samuel Darling, who was in partnership with Michael Schwartz in Bangor, ME, from 1852-1866 before he joined Darling, Brown & Sharpe. The patent was for a method of soldering the blade to the handle frame. 9-1/2" unruled blade, 6" iron framed rosewood handle. Some condition issues, including oxidized blade with a chipped corner and some wear to handle, but still a very rare example of an early patented square. Good (BFN135) 100-200