and costs a shitload of money nowadays. which would make OPs game still worth a lot if it turned out to be Sengoku 3? hahaha
I meant his Metal Slug 3 could be a conversion. Metal Slug 3 exists in two versions, one with P ROM encryption, the other without. The encryption is meant to copy protect the data on the chips, to impede pirating. You could easily get a Sengoku 3 AES and Metal Slug 3 MVS 2nd print, swap the ROMs and you'd have yourself a Metal Slug 3 AES 2nd print, with hand soldered Mask ROMs. That's why he needs to flip the boards over and take more pics.
I hadn't seen that PCB before... Didn't know that MS3 had 2 different layouts
And I am from Spain. Too much shit going on with AES games nowadays
Then you must not have been into the Neo Geo hobby for very long. Check out MVS scans, set 3 is the same thing as the boards shown in this thread.
http://mvs-scans.com/index.php/Metal_Slug_3
It's a later print because for one, the PROG board used (PROGBK1) has no copy protection added, which is normal because SNK also re-released other games (KOF 99, KOF 2000) with less copy protection after their original versions. That and the PROGBK1 board is updated with a 2001 copyright date, MS3 was released 2000.
(I used to own a Metal Slug 3 w/holo label with a 1994 PROGBK1 btw, SNK wasn't always consistent)