This is the 34 I picked up this weekend. What a coincidence! It has a nice box and instruction sheet. Serial Number 40xxx. Looks like it was made post 1957 but before 1960.
The grips are numbered to the gun and looked like they hadn't been off. There was verdigris on the brass pin in the center of the washer. Looks like I could have done a better job cleaning the medallions.