This is a Galco Pouch known as the DMC, model DMC26B.
The DMC double magazine carrier is an exceptional wrap-around design featuring two one-way snaps on back" allowing it to fasten to your belt vertically. It also includes two tension screw adjustments on front" providing a precision fit. Constructed of premium saddle leather and designed to fit belts 1" - 1 1/4" through belt slots and 1 1/2" - 1 3/4" through the belt channel.
Features:
Premium steerhide
Adjustable tension units
One way snap loop fits belts up to 1 3/4";Ambidextrous design