These pictures are taken from an SNK corporate video [available on Youtube].
Graphics artist using an Art box. Is he drawing with a keyboard ?!
Development cartridges using JEIDA cards and a 68k emulator
Mechanical assembly of MV4 slots
SNK's Kobe plant and Esaka office seem to be still active mid-2015.
Video showing that the Esaka office is filled with doors, stairs and Coke vending machines: https://www.youtube.com/watch?v=2EP6s7mDXdU