This isn't the most complex marble ever from Tim, and yet it's one of my favorites ever! Maybe it's because of my early fondness for the 70's arcades that popped up everywhere as a kid, but man, how cool is this design with the quarter slot carved into the surface! The marble is copper electroformed all around the raised slot and 25 cent designs. Tim worked on the finish of the piece to give it that wonderful steampunk look that I also love so much. Such a fantastic marble, and I'm having a HARD time letting go of this one, to say the least! Signed with a plate on the backside that reads 'TK 15 No 001'.