Hi Gerben,
Sorry for the delay in the answer but I was abroad.
As you know I just moved in Belgium and my "babies" are not still with me therefore I cannot check.
In any case I do not remember any additional serial number.
Concerning the meeting we can organise something when you are in Spa.
Let me think how we can arrange it.
Do you post a picture of the serial number you found on the toggle side.
Ciao
Mauro
