BMW 507, tied for the 2nd nicest looking car ever made. Some of it's peers: Mercedes Gullwing, Ford GT40, Jaguar E-type.pic.twitter.com/ANm5iQAu30
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I imagine the drag from that canopy affected performance quite a bit as well
From what I'm reading the MK I didn't feature one and the turret was added in later models. Maybe someone is measuring success differently 
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