After Burner - Sega 32X - identification help!

[Khristophoros]

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?
5843

[Hwj_Chim]

To me it looks like a mistake during printing. Like the template did not get all the way down.

[Ace]

I don't remember either of my two copies of After Burner Complete having that black mark on them. I will take a look tomorrow as I don't have access to either of the carts right now.

[sparf]

Neither of mine have it. It genuinely looks like a printing mistake.