Wingate.
5-6 years ago a gent from ARIZONA posted a 4 inch K22 with a Patridge front sight vice the Baughman front sight. The serial number was several years early for it to be a known Pre Model 18. The peanut gallery raked him over about his fake gun. He lived 300 miles from here, I contacted him and asked if he would sale it. He all to eager to get rid of it, it was a fake in his mind.
I bought it and compared it to any of the many K22's I own, it was not a butcher job at all. Looked good.
I waited 2-3 years and posted the gun, just like you did. Comments I got went like this.
Cut barrel, wrong ampersand, sight base pin has been replaced, wrong crown, sight is not flush with end of rib, to early, fake, fake, fake.
The peanut gallery has very narrow vision. If they do not own one, yours may be a fake.
6 months ago I tried again, the peanut gallery roasted my poor old gun as a fraud. They did not care for it.
I also posted in the upper section of this forum that is limited to members of the S&WCA. The general comment was,"Nice K22, have you lettered it?" Those are some nice people up there. They don't throw peanuts at you, either.
I sent an e-mail to Roy and told him of the gun and that I wanted to letter it and how detailed of info would he accept. I told him I thought it was a pre production sample. He humored me and said send many pics and detailed e-mail.
I did, it lettered. It is real. One of 20 indentical. He called it "Early Production K-22 Combat Masterpiece:. Shipped 26 May 1950.
Here is a pic of the barrel:
Here is a pic of the K22: K 75510
If I was you, I would make the effort to get a factory letter. It is easy to do, they instructions are on this forum somewhere. It is cheap. It can validate the originality of your K22.
As far as 2 holes in the front sight base. Yes, it does not mean anything. I would not be rearranging the parts on that K22 either.
Your picture that shows the muzzle crown and the front sight base set back on the rib, is exactly how mine looks.
If ever you are disappointed in your old, cut barrel, "fake" K22 and want to sell it, I would be glad to buy it. I think a 5 inch barrel K22 would go nice with the 4 inch and 6 inch guns I have. I would put it in that collector's niche called, "Peanut Gallery Rejects"
Bill@Yuma