Somewhat related, curiousmarc has an absolutely brilliant video series from 2016 documenting the restoration of an Alto II: https://www.youtube.com/playlist?li

Somewhat related, curiousmarc has an absolutely brilliant video series from 2016 documenting the restoration of an Alto II: https://www.youtube.com/playlist?list=PL-_93BVApb58I3ZV67LW3S_JEMFnDrQDj https://www.youtube.com/playlist?list=PL-_93BVApb58I3ZV67LW3...