I picked up a frame today which is supposed to be a Zieleman. Prugnat 62bis lugs, Vagner crown, the correct 'type special' decal but otherwise in Frisol livery. Framenumber 1069 on the BB shell, no pins used during construction. Very small ventholes in the main tubes. My guess early seventies
Does this sound about right?
-- mvg
Marten Gerritsen
Kiel Windeweer
Netherlands