Compressor Restoration

Moin moin, I got a compressor without compressor “gifted”. Since the company “Schneider” tells me something and since I grew up in Flensburg I just couldn’t say no. Now I have the good thing here and I have to find out that I have no idea. Therefore the following questions: – Would it be advisable (since 1969) to bring the boiler to the tuv?! Rust from inside he does not have any, that I could check. – Can I “just” a new compressor at Ebay or so bring with 10-12 bar and it fits somehow?! ==> something like this for example : https://www.ebay.de/itm/255924446902 – how can I get out which belt I need?! Just go after length?! Should someone from North West Lower Saxony come so I would also be grateful for help 🙂 On the pictures everything is still dirty and chaotic! Clean is everything now and looks like quality 🙂 Thanks for the help already T5M