Just a lucky bit of browsing I am afraid, popped in just after you'd posted it, knew it was called a Joigny, had to look up the rest! Oddly enough there is a Wassmer 50 three view in the book I am using for the next challenge which looks rather more like the Joigny than any plastic Wassmer I've ever seen.
Anyhoo, here's my challenge, slightly further back in time!
Shouldn't take long I'll wager...