Stamped 'PAT. AUG 8 1887'. Also could function as a screwdriver. Original blade is 12 tpi, 4 3/8" long and stamped 'DISSTON & SONS ... PHILADA'. Handle itself measures 4 1/4" long. Pics aren't the best as it makes them look yellowish. Nicer in person!
**All edge tools may need to be sharpened and/or honed before use**