Firing pin Winchester 62 Bolt with ONE hole on top

This is the firing pin Winchester model 62 that utilizes a the different style locking system in the bolt. If your serial number is stamped with an ;A ; behind it, it should use this bolt and firing pin design (not to be confused with model 62A) Another way to tell is if you only have one pin on the top of your bolt on right hand side (extractor pin) and on the left side of the bolt there is the impossible to find dog leg flat part that is the locking mechanism. ( I am working on getting some of those made)