Welcome aboard, Willem. This should give you a good general overall picture of what the bike needs.
Article - Maintenance Items Needed for a New (old) Bike | Articles
This article is the result of collaboration by Andrew Shadow, CYYJ, jfheath, Max Pete, SMSW, and SupraSabre. Igofar’s list was copied from the first link listed above. Click on the attached file. This one is V.11; in the future, any changes will be noted in the title on the first page as the...
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As opposed to certified!Welcome to the asylum, Willem!
Certified inmate, from Alabama.
Some might say certifiable, but it's just envy.