rikman:
Your Model 19-2 Combat Masterpiece was manufactured in 1968.
The Doc:
I think you have a Spanish copy of a S&W.
That Serial number dates to circa 1938-1940.
The .32 S&W Long CTG was chambered in the I frame pre-war. A limited number of fixed sight K frame .32 Military & Police guns were made between 1948 & 1950 with an S or C prefix to the serial number.
I can't see a S&W monogram in your pics.
The grips are not S&W grips.
If a S&W it has been refinished - the hamemr and trigger should be case hardened, not blued.
That being said, S&W did make around ninety four .32 S&W long chambered, adjustable sight K32 Hand Ejector First Model guns between 1936 & 1941 in the serial range 653388 to 682207. Your gun does fall into that range. If it is a S&W then it may be the only pre-war .32 Long fixed sight K frame ever manufactured. I suggest you take some good quality pics, including any markings (check under the barrel, take off the grips and look at the frame flats, also in the cylinder yoke cut out), then post a new thread in the firearms research sub forum. If verified as original by a factory letter, even with the rust it may be worth a pretty penny to a collector. One of the post war guns may be worth around $500 in fair condition. A one of a kind prewar will probably be worth more.
Don't get your hopes up though, its probably a fake.