Robert/John Sinclair Tobacco Co, founded in 1856, at Blenheim St, Newcastle-on-Tyne. The brothers partnership was disolved in 1885 and both developed their own brands. Robert acquired E J Newbegin, Sockton, and P Mouat & Co.  Became an associate member of ITC in early 30s. Have not come across this "Quaysider" brand before (circa 1920) and wonder if they did it in a tin??

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