Attic Find - 1960s Italian Made LORENZO CHORD ORGAN - Can I FIX it?

I found this in my friend's attic. He has just acquired a property and the attic hasn't been touched in many years. This electric keyboard was up there and it had a thick layer of slate dust on it. I would guess it hasn't been touched in at least 30 years. It doesn't work, can I work out what it is (without the help of the internet) and fix it? Let's find out. Remember that this is just for entertainment and I am not an expert in these repairs. The processes in the video may not be the best way, the correct way or the safest way to fix these things. I do love fault finding and trying to fix broken things, so I hope that comes across in these videos. Many thanks, Vince.