Welcome to Geekhack!
Slider over rubber dome? At least the keycaps are Alps! If a little yellowed, although I can't talk as the NEC APC-H4100E I'm using atm is so yellow its almost brown.
Most of the keycaps with Cyrillic lettering are Cherry MX compatible. There's not too many older MX boards around, and a lot of those will need spacial interfaces to work with modern PCs.
The classic of the old keyboards is the Model M - usually fairly readily available, although I can't recall seeing keycaps with Cyrillic on them.
By the way what's wrong with your English? The only flaw I could see is the word "and" instead of "an", which could easily be explained as a typo
![tongue :p](https://cdn.geekhack.org/Smileys/solosmileys/tongue.gif)
Infinitely better than my Spanish, which is non-existent
![Smiley :)](https://cdn.geekhack.org/Smileys/solosmileys/smiley.gif)
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