Help to verify the Year of Release (especially for Re-Pressings or Reissues) during Phonogram License :

CD: Disc Style during Phonogram times :

1982-1983 Blue Diamonds (on Purple Background) CD
1983-1984 Watermelon Cover CD
1984-1989 Train Cover CD
1989-1992 Silver Background CD (perhaps only for Singles used)
1989-1995 blank CD (without picture) for Albums*
1992-1995 Beige Background CD (perhaps only for Singles used)
1995 blank CD for Albums and Singles used

*Matrix / Runout Imprints at blank CD :

Made in W. Germany (from 1989)
Made in W. Germany by PDO (from 1990)
without an ''Made in' Imprint at Matrix (from 1990)
Made in W. Germany (from 1991)
Made in Germany by PMDC (from 1992)

In 1995 the License to Phonogram stopped and was given to Mercury.

1986-1991 = PDO Imprints were in use
1982-.... = PDMC Imprints were in use

Research for blank CD Matrix / Runout Imprints made by example of the Album 'Elton John - The Fox'.
Please, for further details and explanation, take a look at the Annotations at the Albums with one of the Disambiguation mentioned before at :
Elton John - The Fox