Each one of these metal cups contain a hidden one guilder coin which is back fitted with a plate of the same looking material as the cups. The cups are magnet equipped so that a coin maybe shown and dropped in and adheres. A firm placement mouth down on a close up pad will jar it loose which enables a Monte type effect if desired. 

Condition: Inside of each cup without coin in place you will find tarnish look that with coin in place the spectators never see. The coins metal backing are fine without tarnish.