Following the second world war, Karl Arnold was under American control,
and their toys were stamped with "Made in US Zone Germany." The 1950s
version of the motorbike featured a civilian rider, sans helmet, with an
expression that suggests he's bracing himself against the wind. When
wound it has a clever progressive action. At first Mac remains seated on
the bike with the engine running, then he gets off and stands beside
it. He then remounts and rides in a circle, stops to dismount, stands
beside the bike before getting back on and riding off again.