VERY UNUSUAL 1881 PATENTED SCRAPER TOOL - WHEELWRIGHT'S?

Measures 10 1/4" long. Clear deep patent stamp 'PAT DEC 6 181' which was a Tuesday and official patent day but I could not locate the patent. My guess is it is a wheelwright's scraper for the spokes or similar. Early and excellent.

 **All edge tools may need to be sharpened/honed before use**