The Imp Californian model was introduced in late 1966 but didn't go on sale until January 1967. It continued in production for only a short while until February (or April ?) 1970. During that period approximately 6100 were sold to the public in Great Britain. It is difficult to say how many went abroad.
When the Californian first went on sale it could be bought for £650 (£71 more than the Super Imp), in 1970 it was fetching about £715. As fastback versions of saloons were uncommon in British motor industry, the arrival of the little coupé was news indeed and it did not really have any competitiors.The styling (Bob Sayward's saloon modified by Ron Wisdom, who later moved on to the Rover styling dept.) was its only reason for existence. It was a sporty looking Imp, being a (single headlight) coupé. But it only had the standard engine, not the new Sport unit.
Said styling involved more than altering the rear roofline, though. The windscreen was less steep; the roof was 1½" lowered; the steering column was lowered a bit too. Michael Parkes, half of the Imp designing duo, had insured that there were enough means of adjustment for taller people (he himself being over 6ft tall). The rear window has been so angled that it stays free from road dirt. The opening rear window of saloon models was sacrificed.

Trimwise there were two distinct models, both adopting the same trim as fitted to the corresponding Mk2 and Mk3 Imp Supers. The front seats were reclining and it did have one innovation that has since then become quite common: a split rear seat. It was thought that this would compensate a bit the inconvenience of not having an opening rear window.