Just another episode of Gerry Anderson's UFO with its lovely often recycled space suits. Here they are looking all yellow and freshly painted from being in Journey to the Far Side of the Sun.
which looks a lot like this....
...from picture 7.
My best guess is when they picked it out the skip at Shepperton Studios it needed a bit of repair work and the top seems far more likely a place to stick it back on than where it appears on the original.