I was rooting around my gaff coins yesterday and came across a flipper that I don't recall belonging to any particular trick. It's an American Half Dollar, which is the flipper, and the other side is a Mexican Centavo. Does anyone know how or where this might be used?

I've never seen one with a Centavo.... I've seen them with an English Penny.

Seconded. Some searching doesn't turn up any results about this either.

Can you give any more specifics (or pictures; you can email them to me if you'd prefer not to post them publicly)?
That might help narrow down the manufacturer or era.
- Is the Centavo real, or a replica?
- What type/year is the half dollar? (Kennedy? Clad?)
- Is the groove internal or external?
- Is the insert re-milled or flat?

I'm out of the country presently, but I'll post a picture in about a week. Thank you very much

My friends and I are very curious to see some photos of this odd flipper. Hopefully we can identify the maker as well

Not a bad idea - to make a C/S which can also be shown as two coins in a fan display.

It's been done.
Tango makes one, and Craig Petty had one in one of his coin sets, but those are with an English Penny not a 20 Centavos.

Will Houstoun mentioned to me a few years ago that he was having a flipper made such that the interior of the insert could be shown as a Chinese coin with a hole.