the holsters should fit luger, p38 and other pistols that don't have a bulky slide or frame. A lot of old style .22 pistols if the barrel isn't too long.
The black holsters don't have belt loops, they have brass hooks on the back to attach to d-rings on the swedish pistol belt so they arent very useful as holsters.
JG is still selling off bottom of the barrel scraps leftover from Samco's bankruptcy. I bought a bunch of that stuff years ago and it looks like they have a lot left. You may get lucky and get good condition surplus, but more likely you will get dirty and missing parts with plenty of the green verdigris corrosion on it. That's why it's so cheap.