Duran Duran - Rio

First release with the original 'album versions' with matrix numbers ST-1-12211-Z4 / ST-2-12211-Z4.
There are several variants of later re-issues with the same catalogue number, but different matrix numbers, playing longer versions on side A, the so-called 'Kershenbaum remixes'.

Gold-Stamp promos exist with messaging on top right corner of cover "Property of Capitol Records, Inc. This Album is on loan for PROMOTIONAL USES ONLY." Letter and 6 digit number combinations are stamped on each, as identifiers (example in hand is L 008852).

[Note on the different US releases of 'Rio':]
All 'Rio' lacquers, cut in-contract by TML and Precision Mastering, show a "Z" in the runout matrix and had been consecutively numbered.
Except Z-1 and Z-4, the numbering system counts A- and B-side lacquers separately and was used for all three album variants.
By these Z-numbers, the pressing plant, the album variant and the side of the record can be identified:
Capitol Records Pressing Plant, Los Angeles: Z4 (Var.1,A+B)
Capitol Records Pressing Plant, Jacksonville: Z1 (Var.1, A+B) / Z8 (Var.2+3, B) / Z12 (Var.3, B) / Z13 (Var.2, A) / Z16 (Var.3, A) / Z17 (Var.3, A) / Z20 (Var.3, A)
Capitol Records Pressing Plant, Winchester: Z2 (Var.1, B) / Z5 (Var.1, A) / Z6 (Var.1, B) / Z9 (Var.2, B) / Z10 (Var.3, B) / Z11 (Var.3, B) / Z15 (Var.2, A) / Z18 (Var.3, A) / Z19 (Var.3, A)