My 70s german Hercules "Klapprad" folding bike. with a few minor modifications and upgrades it turned into a very nice little bike. And the doumatic-kickshift is just a great piece of engineering
Zoll-Auktion - 1 Klapprad Triumph Camper (20 Zoll) (ID 774937)
Titanium Number Plate Bolt Kit (USA/Italia) (TINPLATEUSA)
Fahrräder Geeignet für Senioren Faltrad online kaufen | eBay