Is this a WWII Shotgun Shell Pouch? - FIELD & PERSONAL GEAR

I've been offered this rig and was wondering if this is a shotgun shell pouch. There are the only two photos I have. Also, what is the value of a set like this?

US WWII Shotgun Pouch, Made in USA

The Collector's Guild

File:WW2 Norway Waffen SS uniform snow camouflage winter smock MP40 submachine gun ammo mag pouches

Some of my WWII Early War - End War US Army gear : r/milsurp

WW2 USA field gear Shotgun Shell Pouch - repro

US WWII 12GA Khaki Shotgun Shell Pouch, Ammunition & Magazine Pouches - Canada

Ammunition Pouches (American), The United World War II Wiki

The Collector's Guild

44th Collectors Avenue - Scarce shotgun shell pouch - Airtress Midland 1944

Matrix Tactical 20rd Shotgun Shell Pouch - Black, Tactical Gear/Apparel, Pouches, Shot Shell Pouches / Carriers - Airsoft Superstore