One of the labels of the Spectrum Sound Studios, of Westcliff-on-Sea, which were run by Warwick Kemp. There were at least a couple of records on this particular Spectrum label: an album by the Original Tennessee Three, 'In Jersey' (SSS-151 74), and an EP by Stan James (SSS-2012 73), which offered 'Rock And Roll Revival' and 'Freedom Fight' in addition to the two titles shown on the scan. There are no dates on either, but it seems probable that the '74' and the '73' are the years in which the tracks were recorded. Googling failed to bring to light any other Spectrums in SSS-2000 or SSS-100 numerical series, which makes me suspect that the '2012' and 151' may be the day and date of the recording - thus the Original Tennessee Three LP would have been made on the 15th of January 1974, and the Stan James EP on the 20th of December 1973. I suspect that both were custom recordings rather than actual issues. Spectrum Sound was also responsible for the Broadway label (q.v.), later in the decade. Broadway catalogue numbers seem to have been the recording date reversed, which lends weight to the idea of Spectrum's also being based on the date. The three-pronged centre in 1973 would suggest a British Hompohone pressing. Thanks to Robert Lyons For The Info.