Definitely 38 have another photo with the 38 S&W Special CTG stamp, and it is 1950 according to the current owner. However he also said it was a 4 inch which it clearly is not.
Does it have the box, tools, and papers? That will make a big difference in value. 1950 production will have a serial number range of K84,150 – K104,047. So it should be within that range, or possibly a little outside it.
These were identified on the box as a "K-38 Masterpiece Target Revolver."
That is, I believe, a so-called K38 Heavy Masterpiece, with 6 inch barrel. It differs from the original K38 in that the original had a tapered barrel. When the straight-walled barrel was introduced, both were available for a short time (probably until S&W used up its supply of 6 inch tapered barrels), and then when the tapered barrels were no longer offered, the "Heavy" was dropped from the name.
I agree with Shawn McCarver. My guess is a K-38 Target Masterpiece with a heavy barrel. The heavy barrel was not introduce until 1949, 2 years after the introduction of the K-38 Masterpiece, supposedly to match the weight of the K-17 and K-32.
Riccur
Your picture clearly shows a K-38 Heavy Masterpiece. This became the standard barrel configuration on the K-38, and remained so until the Model 14 went out of production in 1982.
Nice revolver!