As with Alex I am new to this forum... and have a wonderful K-22. Talking to a “local expert” he seemed to think mine was an early 50’s as well.. the serial #is in the high 192*** range and has the adjustable rear sights with the longer barrel... I’d post a picture but have no idea as to how that it done.. and another question... My wife loves to shoot it... to the point of not letting me... other than buying another one, (there is no more room in the safe!) what do I do? 🤪.