MADE IN WEST || GERMANY on the front, and MADE IN W. GERMANY BY PDO
is etched around the center hole. These are the only variations that I know of.

front cover of the booklet

Rear tray insert, "Printed in West Germany" with barcode.
I found the POLYGRAM version in this tray inlay.

Rear tray insert says "Manufactured in Germany by Record Service GmbH, Alsdorf."
I found the PDO version in this tray inlay. This version was distributed
outside of the USA. Note the catalog number is in an altered form.

Notes: This disc is uncommon, but not terribly difficult to locate.