Not a lot I can add other than Congratulations on your fine M-57. I am definitely one that uses all of my guns, and while I take care if them, I don’t worry about honest wear showing up. Maybe I’m odd, and in the minority here, but I’d rather see pictures of a well cared for “working” gun than one that’s pristine and appears to never have seen the outdoors. I dealt with the same dilemma on a M-25 I purchased several years ago. It appeared un-fired in the box. Now it has a little bit of holster wear on the edges, and looking at it reminds me of how much I have enjoyed having that gun on my hip.
As to the 57 vs. 29, I like both but hands down would choose the 41 Mag every day of the week. I always say that the 41 may or may not be my favorite cartridge, but it IS my “BEST” cartridge. Sat in the woods with one of mine last night looking for a deer.
Dan