It's important to remember that "Futurama" was not a guitar maker. It was simply a brand applied by distributor Selmer to various guitars they imported from around 1960 onward.
The guitars themselves hailed from at least three separate locations: Japan, Czechoslovakia and Sweden.
The cheapest (but not necessarily the earliest) model was the Futurama Freshman (one pickup), which was vaguely similar to some of the guitars otherwise sold as Guyatones and was commissioned from a Japanese factory. It sold at about £15. There was also a slightly better-equipped model called the "Sophomore" which was very similar to guitars sold under a variety of other brands.
http://www.vintagehofner.co.uk/hofnerfs/futurama/fres.htmlThe more famous "George Harrison" model (Gerry Marsden also had one) with the side-to-side rocker switches and the three-a-side headstock and maple fretboard was supplied by the Czech factory and was also variously stamped with the names "Grazioso" and "Resonet". Resonet made the electronics and it seems that Grazioso (a deliberately Italian-sounding name) was the Czech brand.
There was another Czech-made Futurama commissioned by Selmer: the II (later "Duo", which actually looked more conventional and playable. Smaller and cheaper than the larger Grazioso models, it sold at about £25-£30 compared to the £40-£45 or so charged for the GH model(s).
The Czech/Japanese guitar range didn't actually last long in the Selmer catalogue, though their sojourn in that document could not have been more crucial to the history of British pop music.
In about 1962/63, they were dropped in favour of a small range of re-badged Hagstrom solid guitars (from Sweden). They were much more obviously Fender-styled. The first batches had black-sprayed necks and the separate (very "space-aged") plastic fronts to the body, with pickups, controls and output socket moulded into that fitment. They were also distinguished by that peculiar "grille" between the pickups. They were replaced by a better-looking updated design with the plastic front replaced by a more conventional scratchplate, a slightly bevelled body edge design (shades of the Gibson SG) and a natural finish neck which approached the quality of a Fender. Priced at around the same level as a Watkins Rapier and about (I'd say) the same performance level).
Later still, with the continual advancement in quality of the Swedish manufacturer (and with the falling out of favour of Strat-styled guitars), that range was replaced by more updated solids including a six-string bass.
The Futurama contract with Selmer only covered Hagstrom's solids. Their acoustic and semi-acoustic guitars were imported by Selmer and sold under the maker's own brand-name.
There's more about the above (and a lot of detail I've skipped over) at Steve Russell's site:
http://www.vintagehofner.co.uk/hofnerfs/futurama/fut.htmlJN