Repinning B7 on 1958 Petosa Chambertone Bass Machine

This must have been a "Friday Afternoon Accordion" because this is the second factory-original assembly error I've found since getting the instrument about a week ago. It's strange how these mistakes survived 65 years(!) until finally now I discover them and fix them. There have been lots of chances along the way to address these issues and here we are in 2023 just now fixing them.