Does anybody know the CORRECT thumbpiece for a Model 39 ser#301627 Build#79954 just got it back after 20 years and it needs some TLC and the thumbpiece is the wrong one and does not fit or work before I order one which is the correct one.It was purchsed new 1964. Thanks.Spoke to S&W this morning and the bolt calls for one with stud attached but thia one appears to have been changed and uses a screw.
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