Haven't seen this before, wanted to see if it was special.
I got this 3 screw Donkey Kong in a lot of games. The back has a sticker which is partially missing, but I can read 'Service Product...has been factory....repaired'(?)
I opened it up and it has stickers on the chips.
I'm guessing it was faulty and the owner sent it in to Nintendo to get it repaired, is that right? Something else?
As a bonus, the previous owner must have poured some Pepsi in it because dang, the insides are sticky.
Luckily the pins were fine and the game works.