I have 544932 from December 1927 and 649956 from June 1935. I would think your frame was produced/shipped around 1928-29. (My guns are longer-barrel M&Ps, not snubs.)
Oh my, so, earlier than I had thought.
I bought the little M&P because I liked it, even though of course I was secretly hoping ( well, maybe not so secretely afterall, ) that it could be an early factory 2 inch, but I was not familiar enough with the Serialing range to know more narrowly.
The price was easy going and I am delighted with it, regardless, so, all's well there.
I will get some old aftermarket Mother of Peral Stocks for it I think.
The late '20s are too early for a two-inch K-frame, I believe, so I think the gun has been rebarreled. The 759 may indeed point to a factory return date. If the barrel had been replaced in a prewar or early postwar return to the factory, I would expect to see the serial number on the barrel flat, as factory policy was to transfer numbers to new parts through those periods. Later, replacement parts were simply added without reserialization, marked perhaps only with a symbol, or an S for Service Department.
Possibly the postwar stocks were applied to the revolver when it went back for the replacement barrel. I imagine the gun was nickeled at that time as well.
There may be other interpretations, but that's what runs through my brain as I sit here in the dark small hours on the west coast.
Thanks...
It is definitely unclear, anyway, as to what to make of it! Other than, as we all seem to note, that it had been re-Barreled, and, possibly by S&W at a later time/decade, using an earlier type Barrel, or, done privately, and, who knows when.
Just for the heck of it, I might just get it Lettered, and, see what the S&W Records have to say about it.
If S&W had done the re-barreling, ( pr Plated an previously Blue Revoler with Nickel ) would that tend to show in the records they access when doing a 'Letter'?