All these records are desirable collector's items. The mono Cream albums are highly prized.
All releases are on the dark blue label except Substitute which is light blue.
The records were distributed by Polydor. Even the catalogue number formats similar to Polydor releases of the time. Some of the artists and releases later went to Polydor, or Track, also distributed by Polydor. The Who's EP was officially re-released by Polydor on the Reaction label, in the late seventies, in a nearly exact replica edition. The Who's original EP is worth a small fortune.