Found the first two photos on Deep Funny Monkey:
A very nifty 250cc Ducati thumper bobber. The motor was probably built in the early to mid-1960’s.
The Mach 1 was a clean and fast little thumper. At 255lbs (116kg) it would go over 100mph (161kph) and produced 28bhp at 8,500rpm.
The original bike above probably looked a lot like this a long time ago:
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