Daryl Hall & John Oates - You've Lost That Loving Feeling

Red and White label with RCA in Red, underneath states Custom Recording release date 22/8/80, spelling of Loving and Feeling differ from general release.
Written by hand on label "You've Lost That Loving Feeling" looks like fountain pen and the Cat No PB-9596 also handwritten with the artist's name in the same hand is detailed as Hall & Oates.
Nothing on Runout as single-sided punched centre and additional punch hole, which I understand is usual for Acetates (see Images).
Custom Recording address: 1 Bedford Avenue London WC1B 3DT