I recently came across this After Burner cartridge for the Sega 32X at a goodwill store. Upon closer inspection of the label in front of the cartridge, I noticed a small black mark above the 32X's "X". It doesn't appear to be a worn spot as it looks like it was printed on as part of the labels design. But doing some research online, I tried to look for similar After Burner cartridges for the system and that mark doesn't appear to be on any of them. Anybody know if it was possibly a limited edition run or something else?