I found this advert in the 'Lynn Advertiser' dated 18th November 1960:
“J. W. GRIFFIN & Co. - OWING TO INCREASE IN BUSINESS, WE FIND IT NECESSARY TO EXPAND INTO SWAFFHAM AND NOW HAVE PLEASURE IN ANNOUNCING THE OPENING OF OUR NEW SHOP on FRIDAY, NOVEMBER 18th at 9 Market Place, SWAFFHAM, FOR ALL Electrical Appliances * Contract Work * Radio * Television.”
“J. W. GRIFFIN & Co. - OWING TO INCREASE IN BUSINESS, WE FIND IT NECESSARY TO EXPAND INTO SWAFFHAM AND NOW HAVE PLEASURE IN ANNOUNCING THE OPENING OF OUR NEW SHOP on FRIDAY, NOVEMBER 18th at 9 Market Place, SWAFFHAM, FOR ALL Electrical Appliances * Contract Work * Radio * Television.”