The effect is of a deck of cards that is shown an may be overhand shuffled.  A glass (not supplied) is inverted over the deck and the magician reaches in his pocket and brings forth a few "invisible coins" which are "placed" on the table.  He explains that he will place one coin on the bottom of the inverted glass (which is still invisible) and cause it to become visible.  The magician slaps the glass and causes the coin to penetrate the bottom and appear visibly within!  This is done once more, each time the glass is lifted and the coin slid off the deck.  A third time, a coin is made to appear as the first two and the finale is the glass is removed and the coin is slid off into the glass an it has changed into a larger coin!

This includes British Coins but US Coins could be used if desired.  This deck is quite amazing in the way it functions and the way in which the coins are secretly loaded well ahead and not during the performance.  Includes instructions.  Condition very fine.