This is a remix from a previous Thingiverse file at (https://www.thingiverse.com/thing:4817715) which didn’t have a slot. I added a slot to the center top and scaled the width to support European and British coins. Many thanks to Codah at thingiverse for the excellent model; my photo shows mine and his - please download his to get the model without the slot.
When I get more time, I might add some shallow teeth in the slot to keep a single thinner coin from rolling.
The author hasn't provided the model origin yet.