✅ SOLVED Tag of some kind?????

[Diggin Dude]

I originally thought this was a bird leg tag after cleaning dirt off it I see there is no seam. I am at a loss on what this is and what it was used for. I think it is aluminum.

I use the penny in the photos for size reference .

here is the writing:

IF81 RIV 993

 

[Erving]

I would guess it's a bird band. For what species of bird......

 

[Mud Hut]

International Federation - USA = ifpigeon.com

 

[Diggin Dude]

I'm convinced it's a bird tag thanks Erving and Mud Hut!