That's what I was wondering, too. I have tried to put Sonopresse and Pathe pressings separately due to their different #. Basically, if we follow the guideline every record with different cat# should have its own entry, but label variants of the identical number under the same entry. This LP was distributed by either Pathe-Marconi (2C...) or Sonopresse (2S...), and possibly both of the distributors put out copies with labels of various colours (but so far I've seen only this purple 2S and the orange 2C that Recordarcheologist1 mentioned). I suppose Pathe orange (1974) was prior to Sonopresse purple (1978) but I may be wrong.
I have this record, but seems like it might be a different pressing. Was this ever re-pressed? My version has purple labels and a different pressing number, but otherwise everything seems identical, including the date on it. It lists the pressing # as 2S 068-8168 on both the cover and label (it does however also include the pressing number listed above on the label only), purple labels and 1974 date. Should my version be a separate listing on here or just included here?