|Yes, there was a cassette release in 1973 numbered Track 3526-001. It has a red label |
and was issued in the UK.
There was also a cassette release in USA (and and a few other countries) and some
reissue versions, all with different cat.no's but I would name the UK edition as the most
original one because it was released parallel to the vinyl in November 1973.
Though I've noticed that the 1973 UK release today is much less offered than any other
version I would not say that it is extremly rare. I would estimate the value of the UK
release in mint condition somewhere in the region of 15-25 Euro.