Among the star lots at H&H's anticipated March 13 auction is this rare and coveted classic motor from the 1960s.
The GK1 boasted spaceframe chassis fabricated from one-inch square tubular steel and independent coil-and-wishbone front suspension, a de Dion rear axle and four-wheel disc brakes.
Beneath its fine-looking glass fibre body - styled by the legendary Giorgetto Giugiaro, then at Bertone - the GK1 was powered by a Chevrolet 5.4-litre V8 engine producing 300bhp.
British engineers John Gordon and Jim Keeble created a car with two very different sides to its personality: able to comfortably seat four people, while capable of sustaining three-figure average speeds (0-100mph in 16.1 seconds and 145mph flat out).
`The [GK1's] acceleration makes most sports cars look pretty silly even when you aren't trying... [with] nothing on the road apart from Cobras and things that will stay in front of you.' - Car & Car Conversions Magazine, 1966
Chassis number 43, this historic car was produced midway through the GK1's production, and will auction at H&H with an estimate of £12,000-14,000.
It will sell with a V5C Registration Document, MOT certificate valid until November 2010 and period sunroof.
Also for sale in H&H's auction is a fine example of the 'most popular British car ever made', a 1963 Cooper 'S' Rally version of the Austin Mini.