Roy,
I have a similarly modified holster and about 6 years ago, I sent pictures to noted holster expert Per jensen. He stated that it was probably used on a U-boat. Since then, additional research has indicated these holsters were used on many small vessels, such as the torpedo boats, U-boats and similar craft.
The D rings gave the capability to wear the holster as a shoulder holster or on a sling across the chest making it easier to navigate ladders and passage ways while armed by moving the holster and pistol as required.
G.I. engineering at its best.
Tom A.
I have a similarly modified holster and about 6 years ago, I sent pictures to noted holster expert Per jensen. He stated that it was probably used on a U-boat. Since then, additional research has indicated these holsters were used on many small vessels, such as the torpedo boats, U-boats and similar craft.
The D rings gave the capability to wear the holster as a shoulder holster or on a sling across the chest making it easier to navigate ladders and passage ways while armed by moving the holster and pistol as required.
G.I. engineering at its best.
Tom A.