I noticed something strange about the serial number on my Galaxian. It's all original and in very nice shape, minus the art flaking. The serial number printed on the inside tag reads : "SID" ,with the corresponding serial after it, but it has a line marked through it and it has the Galaxian and serial number written above it. The back of the cab has both SID and Galaxian serial numbers etched in the wood side by side from the factory. Did they get confused and thought Galaxian was Space Invaders Deluxe?