2 vintage keys for winding pocket watches. Each is 1-1/4 in. long with an attached revolving loop for the pocket watch chain. No manufacturer's mark. Winding end fits over a square pin, about 1/16 in. One key is marked with a 6 or 9, the other is unmarked. Keys are steel, in excellent vintage condition. No twist or distortion. Natural patina. Add to your pocket watch collection or use for jewelry.