I started collecting these, does anyone know if there's a way to find out what colors were produced and what stamps were available?
So far I have rainbow stamps on red, yellow, orange, blue and white. I found a black w/ rainbow but it's not the top to bottom rainbow stamps I've been collecting. I have also got a yellow and white with the left to right rainbow stamp... I think I've seen purple out there too, any info appreciated.
Please, tell me more about your aces...