Via Twitter, @arborlowenviron pointed out a link with information about one of the advertisers in the background:
Chamberlain, King & Jones Ltd. was a company of cabinet makers, upholsterers and furniture retailers established in 1851 at Union Street in Birmingham.
Hulley’s Birmingham Directory of 1876 lists the business as “carvers and gilders”; the firm was responsible for some of the carving at the Birmingham Law Courts. Kelly’s Directory of 1895 describes the firm as “cabinet makers, carpet factors, upholsterers and decorators”. The company traded until at least 1956.”