Solid foreskin 3DS system, I mean snakeskin, read more on
andriasang.com.
The limited edition 3DS Metal Gear Soild 3D system will have a snake skin pattern on the top cover, or maybe whole system, not sure. Unlike other "special edition consoles" it looks like the case is not just re-colouring, but is either modified after moulding process or uses a special mould (unlikely due to costs). Either way probably worth a fortune for collectors...