BLANKS ARE THE FIRST PRESS OF THE RECORD TO TEST THE MARKET IF THEY WERE GOING TO SELL IT COULD BE AGES TIL THEY PRESSED UP A NORMAL COPY FOR PUBLIC SALE THEY WERE OFTEN SENT TO SOUND MEN TO PLAY OUT AND IM LED TO BELIVE THEY WERE MORE EXPENSIVE TO BUY.
SOME ARE DEFINATLY UNRELEASED THERES A FEW THAT COME TO MIND ON UK LABELS