SPECTRA SYSTEMS CORP COM SHS USD0.01 (UNRES) revenue for the last year amounted to 16.06 M GBP, the most of which — 14.75 M GBP — came from its highest performing source at the moment, Authentication Systems, the year earlier bringing 10.70 M GBP. The greatest contribution to the revenue figure was made by United States — last year it brought SPECTRA SYSTEMS CORP COM SHS USD0.01 (UNRES) 13.50 M GBP, and the year before that — 9.46 M GBP.