As mentioned your barrel looks just fine, and as for your recoil spring, I wouldn't give it a thought. These pistols shoot mid range ammo, and there is barely any recoil. Your pistol would have had to have been stored in the cocked back position to have compressed the spring long enough over the last so many decades. Matter of fact my 52-2 which has a serial # A107xxx has the original spring in the pistol. I rarely shoot it, but when I do I put a few hundred down the pipe. All of my magazines have there original springs in them as well. Tempered spring steel springs would be more affected if fully compressed over long periods of time.