"Fra-gile ... must be Italian"
Cracks me up every time, love that movie!
On a side note, I FINALLY found something which I've been searching for over a decade. This:
The model (and brand name) is BTC 8110W. And yes, the keyboard is indeed yellowed pretty badly, which unfortunately someone tried to address with aggressive chemical at some point. Most likely acetone or paint stripper of some sort, because the plastic is literally polished up in some areas & therefore permanently destroyed.
Long story short, I took the whole thing apart, showered all the chunks of dust & debris and then put the whole thing into dishwasher for a full cycle.
After carefully reassembling everything back together again, the finishing result leaves something to be desired even though it's not THAT bad, as it would seem (and appear) on digital camera.
The keyboard is fully operational, all the keys are working OK so now I can only hope to "Retrobrite" rest of the keyboard at some point OR to merge it with another, non-functional one which doesn't have any cosmetic issues. The only problem is that BTC 8110 (or 8140 for that matter) are both incredibly rare nowdays and highly expensive. No one is willing to just give them away (actually someone in here, on this very forum - and I'm not going to say who, offered me one for "free" long time ago, only to suddenly change his attitude towards me & eventually have me blocked), and finding one on ebay with all the shipping & handling would easily cost over $50, and that's without the customs & other fees.