The holster was made by Strong Leather............I have one for my H&K P7........and it works very well.....in fact, I sold one to Chickenrunner, about 2 months ago, who's in the Norweigen Police ......I don't think it (the holster) was intended for that type of weapon (the 1911 pictured above) but that design was also made as a Pancake/ shoulder holster (Strong made a system you could covert the holster to a shoulder system for the 3 slotted holsters they produced.
Not defending the holster, as I'd not carry my 1911 types in it, but just pointing out the Manufacturer, and theory behind the design.