Weird one, eh? I vaguely remember one of these showing up before. It's obviously related to the 50 key "nampad" in the Kishsaver IBM 4704 family, but those are straight Model Fs while this is a hybrid whose membrane and connectors have Model M written all over them.
Bad storage is a pain! That barrel plate looks as dirty as a well used Model F. And the shiny backplate, believe it or not, is actually quite tarnished compared to many a Model F. The mirror finish is usually pristine. So much nicer to look at than the backside of a Model M assembly!
But what's that you're using as a prop in the background…
I got one of these from tinnie, before he disappeared. A few have popped up on eBay as well. The ones with relegendables are rarer than the ones with printed caps, as I understand. But both look cool.
I still have some of these on ebay, though mine are the 49 key variant. There's a 50th pad, just have to take out the stabilizer and put another flipper/spring into that barrel if you want to convert to 50 key. Also have the relegendable caps from 4704's if anyone is interested, though those clear caps tend to be rather worn.
terrycherry wrote: What a strange layout. Could it use on modern PC?
Yes, mine actually works simply with a PS/2 adapter. It has a Model M controller on the inside. But you need a Soarer's converter or phosphorglow's replacement controller to change the layout.
the M controller it comes with is very similar (but not identical to) a SSK controller from the same timespan, though these were made for quite a while. Here's some pictures of mine (converted and working on USB). the replacement controller is from a rubber dome M that I got from HaaTa https://www.flickr.com/photos/dork_vade ... 9060149824
These are pretty cool, though they feel more like an M than an F, even though everything but the springs, flippies and PCB are from the F variant. I use mine as a LH pad to compliment mousing around and moving data (cut / copy / paste etc.)