Antique mid 19th Century Double-Edged Tomlinson Currier’s Knife

Antique mid 19th Century Double-Edged Tomlinson Currier’s Knife. Stamped “Tomlinson Patent” on one side of blade holder piece. Believed to be from 1820. This scraper appears to be all original and in good used condition overall. But there is expected age and use related wear and discoloration as shown in pics. "The currier also had an unusual knife for scrapping skins: a wide two-edge blade stiffened along its center with a straight handle at one end and another across at the other end. The knife is sharpened, then held by the straight handle between the knees with the other handle on
the ground, and then the cutting edges are turned over to about right-angles by rubbing a piece of hard steel many times, with plenty of pressure along the edge. This produces an edge something like a cabinet maker's scraper. The turned-over edge is then used to scrape a thin layer off the flesh side of the leather before treating it with oil." This is a hard-to-find antique tool! Excellent collectible!