I purchased one over 15-20 years ago from a local dealer who ordered them from Century. He ordered 20 or so an d one odd one was in the bunch. Its is chambered in 22LR. Did these pistols ever come in 22lr. I took it to my local Gunsmith....in business since '49. He has never seen one like it. Never seen a 22 conversion that works like this one. Barrel does have an "A/I" in a shield on the left side of the lug. Any ideas???? I bought it because I have never seen one and it was supposed to be a 45 in the shipment. Bought it cheap and it shoots great. Any facts or educated guesses appreciated.