This is the rare IBM P70 Alps keyboard. If I didn't already have one, I'd be all over it. It has Alps beam springs
The same Alps switches as in the Japanese IBM 5576-001 and 5576-002
keyboards, but in an ANSI layout, making it the only ANSI keyboard with these switches (unless others surface).
Has a special connector, so you can't connect it to your computer without work.http://link.marktplaats.nl/472640617
Here's what mine looks like: