American coin silver crumber, S. T. Crosby, Boston

Coin silver crumber by Samuel T. Crosby of Boston, Mass. c. 1849-50 in the Fiddle Thread pattern. Engraved "ARM" in Old English on the handle. Baroque etching on the blade with no monogram in the cartouche. Excellent condition with one questionable ding toward the end of the blade that does not show on the back and is barely discernable.