W&W Cycles - Libro »The Harley-Davidson Knucklehead Years Vol. 1 - January 1936-December 1938«
1938 Harley-Davidson EL. Knucklehead
Knucklehead [Edizione: Regno Unito] [ITA] [Edizione: Regno Unito]: Amazon.it: Big Show, Mark Feuerstein, Melora Hardin, Michael Watkins, Big Show, Mark Feuerstein: Film e TV
Harley-Davidson Knucklehead 38EL. Battuta all'asta per 154.000 dollari - News - Moto.it
1936 Harley-Davidson EL Auction by Mecum [The First Knucklehead]