Apparently a one-off label. 6 of 1's sole issue, an EP by the Ron Grainer Orchestra, contained music from the TV series 'The Prisoner' and is reported to have been a product of a fan club dedicated to the series. The tracks on it were 'Arrival (Main Title)', 'Arrival (End Title)', 'September Ballad' and 'Rag March', and its catalogue number was 6 OF-1. There is no date on the label, but the 45cat site suggests 1979.
Copyright 2011 Robert Lyons.