Double-sided Shell enamel sign, by Bruton, Palmers Green, North London. Circa 1930s.
James Bruton and Sons of 87 and 89 Hedge Lane, Palmer's Green, London, N.13., was established in 1864.
 
Dimensions: 61(w)x 38(h)cm
 
Shell plc is a British publicly traded multinational oil and gas company headquartered at Shell Centre in London, United Kingdom. Shell is a public limited company with a primary listing on the London Stock Exchange (LSE) and secondary listings on Euronext Amsterdam and the New York Stock Exchange.
It is one of the oil and gas "supermajors" and by revenue and profits is one of the largest companies in the world, ranking within the top 10 of the Fortune global 500 since 2000.
Shell was formed in 1907 through the merger of Royal Dutch Petroleum Company of the Netherlands and The "Shell" Transport and Trading Company of the United Kingdom.
During the First World War, Shell was the main supplier of fuel to the British Expeditionary Force. It was also the sole supplier of aviation fuel and supplied 80 percent of the British Army's TNT. It also volunteered all of its shipping to the British Admiralty.
 
source: https://en.wikipedia.org/wiki/Shell_plc (edited and citations removed).