I believe the pinned and recessed 629’s in 8 3/8” are a pretty rare bird.
Yeah, 2nd year production lost 2/3 of the frames due to warpage.
They only ended up with a couple thousand 4 and 8 3/8" guns each ,they were the last of the pinned and recessed m629's. Next year brought forth the 629-1 , that engineering change did away with the pinned barrel and recessed chambers. I like it but am honest enough to say I shot my old 29-2 6.5" better and will all ways regret trading it off. MB