Not that size or type no. My 45 holster has the embossed US on it. Most of them do. That's why this might not be military but I don't know why a police department would use military belts either.
I found a site with some pictures a few minutes ago with the same holster without the swivel. Looks like they didn't have the US embossed on them...
Veteran US Navy Seabees - US Army Corps of Engineers - American Legion Post 0867
" Only two defining forces have offered to die for me. 1.) Jesus Christ 2.) The American G.I. "One died for your soul, the other for your freedom! "