I have no memory of seeing it on Black Magic in the 70's, but nobody knows everything. 2 of their releases are on Sheild, check out the great 'Swing', popular tune at Yate. I also have one of those 7"-33 1/3 things by them as well, called 'Keep rolling', but this just isn't as good as the Shield releases. I've seen the Black Magic one advertised as a west coast release, which is even more odd, as they are definatly a East Coast group.