Who made that gun and how old is it? /QUOTE]
Still waiting for his answer.
So the OP's photo is of a Ruger? As Jack Nicholson said in "A Few Good Men" - "Don't I feel like a dumbass..."
The important thing is that the barrel lines up perfectly with the chambers and that the lockup is fairly tight. If that is a blued cylinder we're looking at, I wouldn't worry about it. The Security-Six revolver is a gun you can buy when you're 20 and you won't have to worry about it until your youngest grandson starts having prostate problems! And that's only if it gets shot a lot.It's an early 1970's Ruger Security Six. The condition is not causing any problems, and I hate to risk it getting lost or returned in worse shape - so I will live with it.