Comment by PhilMH:
Probably June 1974; the Discogs entry has 7406 EJD printer date added, but it doesn't appear on any of the images shown there, it might be on the back of the slipcase.
Comment by An6y66:
I've put 1972 but I've just noticed the circle Emi logo top right looks like it may be a 1974 reissue.
Mod Edit: Date Fixed.