This cassette was released alongside the vinyl album of the same name and was the first 'best of' style release produced after Adge Cutler's death. Released in 1977 this cassette was issued by EMI with the catalogue number TC-EMC 3191. Unlike the vinyl album there are no sleeve notes with this cassette, just a list of tracks.
This design of cassette shell was introduced in early 1977 and was produced in both grey (as in this image) and cream coloured plastic. The text was printed directly onto the cassette body in blue (as in this image), red or black ink. As can be seen on the images the tape was produced with the Dolby noise reduction system to improve the quality of the sound when played on suitable players (noticeably to reduce the hiss associated with tape playback).
This album release appears to be only found in the grey shell with blue text.
This style of cassette case insert was introduced by EMI in early 1977. It was printed by Garrod & Lofthouse (who also produced the vinyl album sleeve) in August 1977 as indicated by the line 7708 G&L.
The idea was to have a full height cover which kept the original concept design of the vinyl album release. The only problem was that it often resulted in the loss of the edges of the original artwork.
In the case of this Adge Cutler release the loss of the edges was not an issue and in fact using the original photograph the resulting image showed more than the album.
Beneath the catalogue number TC-EMC 3191 appears another code number OC 262-06 456. Between 1969 and 1982 EMI had an international coding system which they hoped would get adopted industry wide, and they used it worldwide for their own releases. In fact, the numbers used formed the basis of the 7-digit numbers adopted in 1983 and inserted into EAN/UPC barcode-based cataloguing, used to this day.