Please assess whether this WWI shell pouch is genuine

I believe it to be genuine but in poor condition. However, I have only seen photos of these and would like some other opinions. I got it because it was cheap and, if real, rare. It is missing the strap. It is not easy to read the markings but by darkening the photo it appears to be marked "Progressive" and "April S K." The rest is unclear. What do you think? Thanks!

https://www.milsurps.com/images/impo...06bmjpeg-1.jpg

https://www.milsurps.com/images/impo...07wejpeg-1.jpg

https://www.milsurps.com/images/impo...08rxjpeg-1.jpg

https://www.milsurps.com/images/impo...09ufjpeg-1.jpg

You're spot on, it's an M1 ammo pouch for shotguns. Here's a pic shamelessly stolen from machinegunboards and I kept the owner info attached. His is about perfect. At least you have one, I don't.

Thanks for responding and confirming that the pouch is genuine Jim. Dang things are hard to find in any condition. The machinegunboards example is a beauty!