Silver mittens tags
 

Picked these up at a local antique place, too cheap to pass up.

But I have no idea what they would have been for.
I don't think they're tickets or press passes.
The union is in Lynn, Mass. which doesn't help much as it looks like the contest was there several years.

Anything I can find out about them would be interesting

http://www.net54baseball.com/picture...ictureid=25220

Looks like an annual event sponsored by USA Boxing.

I'd guess the "tags" were given to the boxers for participation or awards. (like ribbons)

https://webpoint.usaboxing.org/wp15/...?EventID=12441

Golden Gloves
Silver Mittens

Got it.

LOL, yes, I know what the event is.