Ah!
I still got my old pre-amp, plus some other stuff (interconnects and power cables), in the hi-fi shop, nobody bought them until now, I guess I will have to trade them back to the dealer, admittedly a "friend", with my loudspeakers for new loudspeakers, obviously it will cost me a lot of money, but, apparently, it's the only way to cash my old stuff.
p.s. I guess it's a Naim