I don't see any evidence of a rail mount having been there. Newer base plate, but they stripped out easily, and most were replaced or retapped by now. Same holes, no harm, no foul. I may have an older one. I'll look....
At least they removed the hardware instead of painting over everything. That happened a lot. Looks much neater this way. If you're not completely stripping them down, I'd wait until that time comes before repainting them. We know, but we're all detail freaks. Nobody outside the vintage drum world would ever think anything of it. Particularly with that exterior finish. Go play those things! Wish my Clubby resto was going to be so easy.........