 However, the series was wide-ranging and included a large amount of show music and dance music of the 1920s and 1930s.The record labels were a distinctive pale green with a lettered ribbon surround, and the prefix was SH.The technical quality of these transfers reflected a desire to preserve the tonal qualities of the originals even if it meant keeping a certain amount of surface noise (though at HMV, Len Petts and others were assiduous in finding masters and producing vinyl pressings for dubbing).