Howdy
Yes, it is an early 38 Military and Police Model of 1905 4th Change. No, it is not a Spanish knock off.
Regarding the position of the caliber marking and the S&W shield on the frame, these things changed position over the years.
The SN range for this model ran from 241,704 though 1,000,000 from 1915 until 1942. Difficult to pin down exactly when it was made, but it is very early one, considering how low the SN is. Also, the large mushroom shaped knob on the front of the ejector rod marks it as a very early one.
The earliest 4th Change in my collection has a SN of 3394XX. It shipped in 1920. Very worn on the outside, but with a little bit of cleaning up inside it works fine. Nothing I can do about the worn grips, and I'm not going to replace them. Notice the large mushroom shaped cap on the end of the ejector rod. Later versions had a smaller cap, and then finally the cap was deleted and the end of the extractor rod itself was knurled. My notes say I paid $325 for it a few years ago. Probably paid too much, but I have a warm spot for old K frames.
Yes, I wish I had a dollar for how many times guys say they have a 38 SW SPECIAL CTG and want to know when it shipped.
No comment on running out and buying a revolver for the oncoming zombie apocalypse.