Iron Maiden - Killers banner / repurposed backpatch(?)

Here's a weird little find and I'd appreciate any help/further info on it.

I purchased this on Finnish rough equivalent of eBay, Huuto.net, from a seller who couldn't tell much about it other than it appeared to have been a backpatch before someone had decided to sew it on a fabric and attach loops on top to make it a sort of banner thingy. I agree with his assessment, though I don't rule out the possibility this could have also been cut off a shirt.

The printing is a little thick-ish in places and feels somewhat plastic. It's not worn in any place, the light is somewhat harsh and direct above it and reflects in places. Would be great if anyone could tell whether this was a shirt or a bp before it was bannerized!

I'm thinking about putting it to use as a backpatch, especially now since Paul passed away, but I'm not sure if I should undo the sewing work or just use it as is. Suggestions?