“Rocka Rolla” 1974
Sleeve notes:
1st pressing: Non-gatefold sleeve, Robert Stace credit (bottom right corner).
2nd pressing: Non-gatefold sleeve, no printer’s credit. Pye Records credit.
Label notes:
1st pressing with Decca style matrices and credits on labels: “The Decca Record Co. Ltd”.
2nd pressing with Pye style matrices and credits on labels: “Distributed by Pye Records (Sales) Ltd” on label.
Matrix 1st press (stamped):
XZAL-13291.P-3W
XZAL-13292.P-1W
Matrix 2nd press (hand etched):
G U L P 1 0 0 5 A – 1 – C
G U L P 1 0 0 5 B – 1 – C
Rare Record Collector 
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This is not entirely correct… there is a 2nd printing on Decca matrices with Robert Stace printing credit. The difference is that the line “Thanks for the Words Al!” is missing from the back cover. This is a reference to original singer Al Atkins letting them use the name Judas Priest and some of his uncredited lyrics. The Pye version is then the third printing.