The revers side of the sleeve mentioned the identification of this LP as - aims LP 505 STEREO-MONO
The etched identification of the matrix runout off both sides is clear as giving PIM-504-A & PIM-505-B.
Could there be a printing error on the sleeve?
Matrix / Runout: PIM-504-A P-1970
Matrix / Runout: PIM-504-B P-1970