Very likely not a name brand but a home built. The giveaway is the wooden blocks glued to the sides and front -- they are used to hold the bottom cover screws.

That is Klimo monoblock amp. They were made in Germany in the 80’s and i believe early 90’s.

Great stuff

Do you have the other one ?

Chers

Looks like a project I did at DeVry in the late 60s. :)

Agree with @muljo. A pair currently listed:

Dr Klimo Kent Vintage Tube Power Amplifiers

Condition:

UsedUsed

Price:

US $2,699.00

Only pair I've seen in the U.S. for sale.  Several are listed in Italy and Germany.  I've read great reviews on the amps and they are quite a collectors item right now, especially the Monoblocks.