For me it was Little Piece Of Leather - Donnie Elbert. There was a family at the end of the street called the Blakes who were skins. I used to hang out with one of them and they had all the Ska, Motown etc.
Up until then I only had pop and one of the Motown collections.
Some months later and I was buying my first Northern tune, Van Dykes - Save My Love For A Rainy Day on a pressing from The Watson Hall All-dayer in Tewkesbury.
Happy days