This is a large and colorful identically dual-sided slot and tab candy holder made by an unknown manufacturer. I was only able to add one to the collection perhaps 6 years ago, so these are not plentiful. When I got it I was surprised at just what a powerful display item it is! This one looks to be in nice condition. The last one ended on eBay almost exactly one year ago and sold for an astounding and unsustainable price of $347.98.
10/02 Update: This sold for a somewhat more reasonable price of $255.