Thank you AdamS!
Yes, it must actually be a Beomaster 3400.
What’s still strange is the label on the bottom that refers to type 2801 which is the Beomaster 2000 …
The remaining PCBs and components of the 3400 look quite good (at least compared to my 2000), I think the only electronic parts that are actually missing belonged to the FM tuner (the P1 – P5 station pre-sets are in place).
I’ll check if the amplifier part is working and then take it from there. Is there likely any demand for Beomaster 3400 parts and spares?
