Well, here we go again!
First, this is a FIRST Model----not a 2nd Model. Any and all who are in doubt are invited to place their $1,000 wager on the table, which I shall cover. Next, get a letter----which I shall pay for----IF the letter says it's a 2nd Model----which it absolutely, positively WILL NOT.
This is what some folks like to call a "transitional" model. I don't know why they want to call it that, because it's simply an example of S&W using up old parts. The old part in this case is the frame. It's a 1st Model frame------two pins---one for the trigger---one for the cylinder stop/bolt.
Does it look like a 2nd Model? Absolutely----and if it carried a 2nd Model serial number, it would letter as a 2nd Model. It does not carry a 2nd Model number-----and it will not letter as a 2nd Model. (See wager offer above.)
In other words (literally), there are more than a few SS's out there which are configured EXACTLY the same as this one. Some of them are 1st Models. Some of them are 2nd Models. The serial number is/will be the ONLY difference. (And as far as the serial number being on the butt goes, we consider that as a mistake. The guy who stamped the number there would have a hard time understanding that----as in: Who cares?
Bottom Line: There are several odd-ball SS's out there (most being some variation between 1st and 2nd Model). This is one of them. It is also one of them with the lowest 1st Model number I know of----which will most certainly get Terry Wagner's attention.
Ralph Tremaine
And by the by----if the frame/barrel/sight numbers don't match, it then becomes a lump of coal.