Autobarn Gecko on Ebay

Like the use of "Autobarn" as a make - wonder who registered that, and when. A quick web search reveals it to be the trade name of several car dealers, some specialising in classic cars.

Anorak note: a lot of design changes happened to the Mini in 1964, and any donor would have been earlier. Dunno about the mechanical bits, but some of the electrics are much later - the steering column binnacle and starter solenoid for example. Originally the car would have had floor-mounted starter button and dipswitch.

Engine is "thought to be" 848cc - engine number apparently missing. To my eyes the carb doesn't seem skinny enough to be 1¼" but I could be wrong.