There were two singles issued with SM-0 numbering. Both of them were by Silver, with backing by different bands. The first, 'Baby Oh Yeah' (SM-1), was on the Silver label (q.v.), while the second,'Beautiful Place' by Silver With The Magnets (SM-2) was on Fiery. Neither label had a date on it but SM-1 is reported to have come out in 1973, so presumably SM-2 appeared not too long afterwards. Robert Bowes, who kindly brought the label to my attention and supplied the scan, says that the songs are both Reggae; Mark Griffiths writes that Silver owned both labels himself.
Copyright 2011 Robert Lyons.