Mark III's are cool, but pricey. I mean the real Japanese Master System. See in Japan first there was the Mark III,
it got an FM Sound Unit add-on.
The Japanese Master System looks just like the World Master System 1. But it has the FM Unit inside it, also has a
port for directly attaching the 3D Glasses (does not require the card slot adapter).
The USA and Europe "Master Systems" are NOT really Master Systems. They are Mark III's stuck inside a Master System
case. Only Japan got the true Master System