See A Bowett, Early Georgian Furniture 1715-1740, plate 366, for a closely comparable japanned corner cupboard with the trade label for John Belchier, who worked in St. Paul's Churchyard from 1717.
A closely related corner cupboard possibly from the same workshop with the addition of a small superstructure to the top and formerly in the Edward Hudson Collection is illustrated in R. Edwards, The Dictionary of English Furniture, Vol II, London 1924-1927, p.174, Fig.3.