While fishing through my pistol stuff this post occurred to me. I was congratulating myself on how my Walther Manurhin PP in .32 fit perfectly the holster I assigned it. Them I picked up a near same size pistol...a Polish P64 9x18 and it fit pretty good too. No telling, but the maker was probably doing a one size fits some thing.
The Manurhin is more collectible in that it was made in France after WWII in what had been a Walther shop and under license to Walter.... in a French we hate Germans way probably. The P64 isn't my favorite 9x18 but dark sheep have families too.
Both of these pistols I have posted about in more detail before here.
How they are fastened to web gear or belt is different. Some have wire attachments, most have fabric or leather belt loops. Some have a top strap that attaches to something. Most don't . The size of the weapon has a part in how the holster attachments look and are angled. The Civil War holster, reproduction, was made to place for cross body draw.