The crazy mid 70s... they were the time of a lot of odd designs, this is a 76 Ferrari Rainbow by Bertone

see a gallery at http://swissstash.tumblr.com/post/12171398029/1976-ferrari-rainbow-by-bertone

Prototype of delivery tricycle - scooter Peugeot S 55 in 1958

Via: scooterspeugeot.fr

a very rare Porsche, the Beutler... a coachbuilder made just 5 prototypes, it's the 2+2 of the 356's (Boyt-ler)

 

 

Quad prototype

Merciers - J.A.P. 350cc engine tracked motorcycle 1937 - France

More info via: thekneeslider.com

1939 Delco military trike prototype by GM

1939 Delco military prototype built by General Motors. The rear axle was from a Bantam automobile. Most of the motorcycle was a clone of the BMW 750 cc flathead opposed twin. Fred Crismon collection

Via: rolliefreebook.com