 About 455 2+2 cars were built.By the time this model emerged, Harvey Wooldridge now considered this to be the fourth car he had designed, hence the name H4.The H4 was based on the Mark3 Fiesta and used what is often erroneously referred to as a "surrey top" roof panel (which could be stored in the boot) and a rear section which could rotate into the bodywork to make a full convertible.