This is a very nice, clean large size corner brace. It is marked "DUMONT MFG. CO. BUFFALO NY PAT. MAY 13, 1884" on the chuck sleeve. The brace has a U-Joint drive system that allows the operator to crank the handle within the frame work of the larger brace frame work. The two jaw chuck and drive system are all in very good working order, and cranks smoothly with one speed. The handle all appear to be rosewood, and all are solid, and fit correctly, the 3" diameter end knob or handle has some sort of old repair, as it appears that it may have had a chip out of the center of it, then someone added some wood filler the the area of the chip, the other two handle spin freely, and are in very nice shape. The bare metal steel frame has some pitting on about 80% of it, not rusty now, clean. Overall a very nice rare brace! Records show that Dumont Mfg. Co. made these for about 3 years, when the company name was changed to Dumont Tool Co., and that business only stayed in business for a few years also, until 1901. We have also seen braces like this one marked Amidon Tool Co., and were made by Amidon in 1895 previous to Dumont. A very well made, rare drill!