There must be continental forums for better answers. I would think a European maker would make more sense for availability and service.

Any used pro amp should be gone through because almost without exception they have been ridden hard and put up wet. In the States the best bets are amps that have been in churches. Dutch Reformed, Presbyterians and Lutherians probably the safest choices there.

The JBL UREI 6230/60/90 amps are pretty decent, actually, and I believe they were marketed for 220 volt grids and in the stated era, or close. The 6290 sounds the best to me and has the power needed. Has a fan, but a tech could alter the control circuit.

Don't know if Bryston is marketed in Europe, but a 4B ST would be a good choice.

I agree on the Phase Linear amps. Dangerous to both your speakers and your nervous system.

Again, not sure if ever sold in Europe, but the Harman Kardon Citation 22 at 200 wpc has often been recommended here, although I have no personal experience of it.