Good afternoon friends, I'm a collector and I'm having trouble identifying a double dragon cartridge sealed in NTSC, I found several on ebay that have the AK-050-02 manufacturing code that are PAL, some member or administrator can clarify me if the box in Does NTSC have another manufacturing code or do you also have the manufacturing code AK-50-02? How to identify the sealed cartridge in NTSC? I know that if it's out of the box the NTSC model is black and has the Double Dragon logo, PAL models are white with text only. Thanks for all the help you can offer me, I'm looking for one of these in sealed NTSC but I can not tell the difference by the box.