Hi!
Thanks for REALLY quick reply. I haven´t been in touch with any company that give such great support. And now we´re talking old discontinued equipment.
Just to clarify if there were any misunderstanding.
The unit I have now is serial number VC230-136 and this unit doesen´t have VC1 written on it.
The unit I am to buy (hopefully) Has serial nr. VC7-520 and have the letter VC1
The VC7 in the serial may still be a mystery , but I just wanted to make sure I´d explain it correct.
Thank´s again for the very great support.
I show my wife your personal answers to my questions and she just stares at me like i´m a fool with a very big smile.
I´m sure other members on this forum understand the great feeling of being able to communicate with the engineer himself. 
Have a great summer
Fredrik Berg
Sweden