Police say Alvin Ricketts was "truly brazen", wearing a variety of flamboyant hats and dinner scarves around Soho.
The senior officer leading the operation, Detective Chief Superintendent Kevin Southworth said:
"Alvin Ricketts was one of a group of drug dealers arrested as part of Operation Rense who congregated in Soho. Ricketts was truly brazen in his offending, wearing a variety of quite flamboyant hats, dinner scarves and other outfits that made him stand out.
"The 74-year-old would regularly travel from his sheltered housing accommodation to sell class A drugs in the heart of the West End."
More top news
Four men have been jailed for their part in the murder of a legal administrator, who was stabbed outside a pub on Borough High Street.
An American man has been sentenced to life in prison after travelling to the UK in a bid to murder a woman he met through online gaming.
The National Lottery has revealed the place where people win more big payouts than anywhere else - and it's in the capital