U S Government Holsters are quite popular when you can find them. This one for a 1911-A1 for police probably from the Viet Nam era made by CATHEY ENTERPRISES and has a National Supply Number 1095-01-211-7962 and P/N 99A-RH-P
I've got one to post I've never seen nor can I find any info on. It's marked "Command Leather 10056" and it holds 12 rounds of 38spl ammo, not in speed loaders, just 12 rounds, six in each side. Google turns up nothing and I quit searching for info a while back. I ran across it again this weekend while cleaning up my back porch, it was in a box of misc gun stuff.
Top to bottom: My Ruger new flattop Black Hawk in
a Bianchi 1L lawman, model 10-8 in a Don Hume Jordan style, and my 28-2 in a Bucheimer Patrolman swivel holster along with a Bucheimer Jordan style holster.
I have been a fan of George Lawrence holsters for many years. The model 100 Lawrence quick draw flap holster has always untriaged me since I saw one in the 1960s. It was a used one for a 6 1/2" N frame and I considered buying it but I only had a 4" N frame S&W at the time. Every Lawrence Holster advertisement showing the model 100 said FOR RVVOLVERS ONLY. I recently found a Lawrence model 100 size 643 for a S&W model 41 with the 5 1/2" bull barrel. Therefore they made at least model 100 quick draw flap holster for a Semi Auto Pistol.