Pictorial puns and parodies using the caption 'Guinness Time' were frequently used during the 1930s-1960s in Guinness advertising, appearing on press ads, posters and even on TV. It was during this time that illuminated Guinness Clock signs made from neon lights appeared on the facades of shops, pubs and hotels all over the country. Indeed they were to be found in many city centres including Bristol, Cardiff, Derby, Leeds, Newcastle, Plymouth and Sheffield. Some larger towns like London, Liverpool, Manchester and Birmingham had several clocks on display.
The most famous of all these clocks was the one in Piccadilly Circus, London, and 'meet me under the Guinness clock' was a common phrase at this time.