Welcome to Deskthority!
The Cherry G81-3000 is quite well known. There have been variations with and without Windows keys, for many languages, with keys in different types of plastic and printing. I have had one like yours (German, without Windows keys) but with the keycaps in a different plastic and with key switches with white stems.
There is even a
primitive article about it in our Wiki with some pictures of more exotic variations.
There are three known variations of the
Cherry MY key switches in the Cherry G81 series.
There are a few fans of them, but those people are in minority because of the steep rise in resistance when you press the keys. Some say that the all-black ones have a nicer key feel than the ones with white stems.
The G81-series keyboards are otherwise mostly acquired because (most of) the keycaps can be pulled off and put on keyboards with Cherry MX switches (depending on what layout they have, of course).