Ok, this is not a rare album, perhaps old, but not too rare. Nevermind! Since some days ago I'm fascinated with all related to "Deram Records" and the methods of "Deramic Sound System", so I think this one could be interesting for you too!
"Days of future passed" is the second album and first concept album of "The Moody Blues", released in December 1967 on... yes... "Deram Records".
After two years performing as a struggling white R&B band, "The Moody Blues" were asked by their record label in September 1967 to record an adaptation of "Antonín Dvořák's Symphony No. 9" as a stereo demonstration record, (The guys at the record company were at the peak of development of the Deramic Sound System). Instead, the band chose to record an orchestral song cycle about a typical working day.
Recording sessions for the album took place at Decca Studios in West Hampstead, London during 9 May to 26 November 1967 and this was the final result. Psychedelic tunes, ballads that sound like taken from movies of the 60's, and a great orchestral accompaniment by the "London Festival Orchestra".
Some people listed this record as a precursor to symphonic rock music.