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?

Equipment - 13th Guards Poltavaskaya

Curator's Pick: The Weapons Collection, The National WWII Museum

WW2 USMC 1st Aid Pouch 1942 Dated Marine Corps –

5.11 Tactical Flex Shotgun Ammo Pouch (Color: Kangaroo), Tactical Gear/ Apparel, Pouches, Shot Shell Pouches / Carriers - Airsoft Superstore

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

Sale 1019 Arms & Armor by Hindman Auctions - Issuu

US WW2 Canvas Shotgun Shell Ammunition Pouch Marked JT&L® 1944-D. OD

An updated picture of my Korean War stuff : r/Militariacollecting

2024 Guide to Load Bearing Equipment: History, Tips, & Misteps