Matrix A: PCA 0495 MP (etched, MP is stamped)
Matrix B: PCA 0492 MP (etched, MP is stamped)
Pressing Plant: Unknown
Material: Vinyl
Matrix A: PCA 0495 MP (etched, MP is stamped)
Matrix B: PCA 0492 MP (etched, MP is stamped)
Pressing Plant: Unknown
Material: Vinyl
Matrix A: PCA 0495 (etched)
Matrix B: PCA 0492 (etched)
Pressing Plant: Unknown
Material: Vinyl
Notes:
I assume this test pressing has stamped MP like the stock copy.
Label images from RJ.