Three and four-edged boltheads on Game Boy Original

[Dark_Sol]

Question for Game Boy Guru's here.
I've got a Game Boy Original (the Tetris Pack) and it has a four-edged boltheads on the back. I thought all nintendo game boy's must have a three-edged ones. So these ones were changed?? Or it is possible?

[kedawa]

You mean the screw heads are phillips instead of a tri-wing?

[Chuplayer]

Some Game Boys have phillips head screws. Just like a lot of NES systems. I actually had a Game Boy wide open sometime in the late 90s when I was a kid for the hell of it. It's interesting in there.