I found this advert in the 'Harrow Observer' dated 5th January 1967:
“HOWLETTS, now backed by the wide experience of ELECTRICAL SERVICE (EDGWARE) LTD., SPECIALIZING IN HI-FI and AUDIO EQUIPMENT, RECORDS. See all of our full range. RADIO, T.V. and DOMESTIC APPLIANCES, DANISH P.S. WALL FURNITURE. Call HARROW 4179. HOWLETTS, 52-54 STATION ROAD, N. HARROW.”
“HOWLETTS, now backed by the wide experience of ELECTRICAL SERVICE (EDGWARE) LTD., SPECIALIZING IN HI-FI and AUDIO EQUIPMENT, RECORDS. See all of our full range. RADIO, T.V. and DOMESTIC APPLIANCES, DANISH P.S. WALL FURNITURE. Call HARROW 4179. HOWLETTS, 52-54 STATION ROAD, N. HARROW.”