thx for your comments and support, guys!
Love it Ully ! Love neons. especially these old ones !!!!!
remember the neon licht sign? really a shame that it got destroyed before i could safe it for you ...

I see you numbered the wires but I would advice to replace all wires with new ones. 40/50 years of corrosion probably didn't keep those cables in good condition.....
i will replace them for sure, just kept and labeled the old one as a reference for the length i need. in fact, the shop offered me to buy the original wires / cables as well, but since they don't need that stuff anymore (they are using new silicon wiring), i would have had to take a roll of 100 meters for 300 euros - a little bit too much because most of the wiring is invisible in the end. so i passed!
I would help for sure. I am only 50 minutes away. 
eh, help? where? what? 50 minutes?

That was really rusty 
Nice to see, that another piece of art from the past will be saved. 
hopefully i'll be able to save as much as i can. i have two different options at the moment, not sure which route to take yet. it depends on what the expert who's coming over tonight is telling me ...