I found this advert in the 'Pontypridd Observer' dated 22nd March 1974:
“NOW OPEN - Your new Record and Tape Centre, K G RECORDS, THE MARKET, PONTYPRIDD (Situated directly facing entrance from Market Square) with the fullest possible selection of LPs and Cassettes. SPECIAL OPENING OFFER - One Blank Cassette (value 75p) FREE with every non-budget LP or Cassette purchased.”