At the other end of the scale, we probably have a few old aluminium francs somewhere. They were still on the go, mixed in with the new stuff, when we came to France, and people still spoke in old francs - cinq cent balles was 5 frs and a brique was 10,000. Kinda confusing when you aren't yet fluent.
Come to think of it, some of them still had the Travail, Patrie, Famille slogan on them instead of Liberté, Égalité, Fraternité.