1D50.69 Puzzle

Puzzle A coin in a disk is spun along its axis in order to get the coin to fall out.

A puzzle toy from a conference. A quarter sits in a transparent disc. The entire disc is suspended by a keychain loop. The quarter is resting in a groove that seems to be almost, but not quite, large enough for it to slip out of the disc and fall to the table beneath.

Location: Puzzle B2-3