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28-2 number questions

1097 Views 2 Replies 2 Participants Last post by  Gizamo ser. # on frame.on the crane there is a small 5 digit number with a larger D18.what do these other numbers mean and what does the 2 after the 28 signify?this is my first smith so its all new to earlier post showed it was made around 74.does the year effect the value?

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The Serial is on the butt. Sometimes on the frame under the crane but always on the butt. If made between 1954 and 1970 there will be an S prefix. After 1970 there will be an N prefix.

The "-2" is an engineering change made in 1962 (changed to left hand threads on the ejector or something like that). The "-3" eliminated the chamber counter-bore and barrel retaining pin in 1982.

All those other numbers you note are factory assembly numbers. No real meaning to us.
Here it is in a nutshell for the N Frames

Model 20,21,22,23,24,25 (except 25-5) 26,27,28,29

-1 1960 Change to LH thread
-2 1961 Cylinder stop changed, hole in front of trigger
guard eliminated
-3 1982 Eliminate cylinder counterbore (magnums only)
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