Well, thanks! It was worth a try. I'll leave the frequency at 60Hz with a comment that it could be wrong.

Trumpy,
you could be right on the right one. [Linked Image] The transformer looks like the ones in Sweden, which are of course usually made by ABB. But, then again, I don't know what transformers look like in other countries.

Belgian,
Thanks for your input. I know that you have 20A circuits, but can you connect a 20A appliance to a socket? I was under the impression that the French/Belgian socket was rated for 16A. Or are special 20A sockets common? I'm happy to correct the information if I'm wrong.