a womens brooch maybe?.
As you mentioned the fastener/pin looks unfamiliar to me!..
It's a wasted trip baby. Nobody said nothing about locking horns with no Tigers.
I'm Spartacus, not really i'm Paul!...
Nothing wrong with this badge/pin, in my opinion...Here's a similar reverse set-up that I own...
it always feels good to get it right and not get a bo--ocking.lol.
Thanks, friends. I have found exactly the same badge in web. Now there are no any doubts about it.