Found on a Spanish trading site, seems to be a BTC 5349 labeled "Inves"... Couldn't find much info googling, only what's on the Deskthority wiki. It's apparently some sort of capacitive switch with Cherry MX keycap mount. Is this any good?
Link
They look like
BTC domes with sliders to me (speaking of the DT wiki). They're considered good RD switches, though. Chyros has been positive about them
in his reviews and comments. To paraphrase him from that video I just linked to (I love quoting the greats):
I like them... I think they're nice. But don't go spending a serious amount of money on these. The point of these boards is that they are cheap—and while they're good for such cheap boards, if you shell out for them, you'd have to compare them to really serious players on the mechanical market.
They're probably comparable to IBM's post-mechanical KB-* boards—which are plentiful on eBay, and also among the better RD's. But they're still RDs.