This is a gem from one of the rarest series Mike did, his UFO Crash Landing series! I've only sold a couple of them out of all the hundreds of Gong marbles I've sold, although I do have a nice collection of them myself which I'll never let go of, heh. I just love them, with the sweet opal UFO flying around in there, the vapor trail behind it. Such a killer design, and here's your rare shot at one! Signed 'M Gong 2008'.