One of those sad cases when all I can do is note the existence of a label and, thanks to Freakbeatjames of the 45cat site, provide a scan. Proteen was responsible for at least one record, an EP by The Sparkles featuring 'Tell Me The Answer', 'Did You Imagine', 'Summer Song' and 'Maggie's Double'; it came out in 1974 and had a catalogue number of PRO-1. J.P. Bryan produced the record, wrote three of the songs and co-wrote the other, so it seems reasonable to guess that he was the driving force behind the band and the label. Googling fails to reveal the existence of any other records in the PRO-0 series. Thanks to Stephen Small for bringing Proteen to my attention.
Copyright 2016 Robert Lyons.