That was not a model spaceship, rather it was a 1956 Chevrolet Bel-Air hood ornament.
While I admit they are very similar, I can see differences.
Length of tailpiece
Length of wingtips past "risers"
Fatter body (the spaceship, not the girl :) )
Due to the angle, the nose could be different (no beak) and ridge around eyeline, but can't tell
Here's what the photographer said about it:
The space ship would be the fruit of the tree of knowledge and the girl, the fruit of the tree of life.
The space ship could be made by Mick Milligan, a jeweler at the Royal College or Art.
http://www.bobseidemann.com/blind_faith_doc.html
I'm going with he did in fact follow thru and had the jeweler make the spaceship, taking the above visual points into consideration. Still doesn't answer why a spaceship would need wings, maybe they're scientologist and believe in the DC8's.
A buzz built about the band, since it contained two-thirds of the immensely popular power trio Cream in Ginger Baker and Eric Clapton working in collaboration with British star Steve Winwood, of the Spencer Davis Group and Traffic. The fourth member was bassist Ric Grech of Family. Clapton played acoustic guitar on this track, which is something he rarely did. In his previous group, Cream, he played long, intense solos, something he wanted to get away from with Blind Faith.
They began to work out songs early in 1969, and in February and March the group was in London at Morgan Studios, preparing for the beginnings of basic tracks for their album, although the first few almost finished songs didn't show up until they were at Olympic Studios in April and May under the direction of producer Jimmy Miller. The music community was already aware of the linkup, despite Clapton's claim that he was cutting an album of his own on which Winwood would play. The promoters and record companies got involved, pushing those concerned for an album and a tour.
The album cover was a photo of a young girl with no clothes on holding a model spaceship. According to photographer Bob Seidemann, who shot the cover, he had the idea but did not have someone to pose. While riding the London subway, he saw a young girl who would be perfect and asked her to pose for the cover. He went to the girl's house to ask her parents' permission to pose topless for the cover. They agreed, but the girl backed out. However, the girl's younger sister begged the parents to let her pose instead. They agreed and the younger sister ended up posing for the cover. Bob Seidemann came up with the concept and took the photo, which represents humankind's relationship with technology (this was when the mission to put a man on the moon was big news). The band wasn't yet named, and when Seidemann took the photo, he called it "Blind Faith." Clapton decided that should be the name of the band.
Steve Winwood – keyboards, vocals, guitars; bass guitar Eric Clapton – guitars Ric Grech – bass guitar, violin Ginger Baker – drums, percussion