This Winchester manufactured breech bolt is for the model 1906 slide action rimfire rifle in 22 S,L, & LR caliber and is in very good condition exhibiting a brownish gray patina with light dings, honest wear and possibly a few specks of pin prick pitting. (file photos)
Note: Winchester model 1906 takedown slide action rifles with the following serial numbers have been observed with this part:
100K: 162122 & 163781
300K: 312061, 333347 & 359560
400K: 405314 & 442486
600K: 611843 & 655997
700K: 785298