Red Bear MK 60. Cool Russian made amp from the 90s, similar to JCM800 as they say. It is crunchy and crisp and it rocks. It was distributed by Gibson (of all people) in the US but only for a few years. The large silver pan houses the power supply caps.
These originally came with Russian style 6N2P preamp tubes. Similar to 12AX7 but harder to find, so it is common to rewire the tube socket for 12AX7, which is not hard to do.
Amp needed power supply recap and broken jacks replaced. Build quality is similar to Sovtek, a mixture of rugged and ultra flimsy. Sounded sweet at least. Oh well.
Schematics for Red Bear MK60 are at the triode site. — http://www.triodeel.com/schindex.htm