The letter on this gun has arrived!
As suspected, it originally shipped as a .22 SS 1st Model (Model of 1891). It was sent to Marcus Hartley Co., NY, NY. Blue finish, 10" barrel and Extension grips. Sent Aug. 31, 1900 (for you who track these the serial is #19056)
I actually got double information on this letter as I included the serial that is on the barrel and cylinder. It is from a .38 SA Second Model 4" blue shipped to M.W. Robinson, NY, NY on Nov.5, 1883.
So at sometime an owner decided he wanted a 3rd Model SA and went ahead and made one. (Complete with moving the adjustable rear sight from the .22.)

I still haven't quite figured out the rebounding hammer/half-cock, so if anybody happens to have the hammer spring out of their 1891 SS 1st and/or 3rd model SA .38, I would be most appreciative for a length measurement.
The one I have mikes to 3.246" but there is a slight set in the spring, so let's call it 3 1/4".

Now the question is, should I just leave it as it is. (I don't have much in it) or should I try to track down a somewhat correct barrel??? ($$$?)

__________________
Dean
SWCA #680 SWHF #446