I found this tidbit about SS Edkins, who was apparently a silversmith before marrying the daughter of the globe maker, Thomas Bardin, in 1832.
"The globe production of Thomas Marriott Bardin was taken over by Elizabeth Marriott Bardin (1799-1851), his daughter, in 1820, a year after her father's death. After her marriage in 1832 to the silversmith and member of the Cutlers' Company, Samuel Sabine Edkins, the globes were sold with the label of 'S. S. Edkins, son-in-law to T. M. Bardin'. A son of Edkins' (from an earlier marriage) joined the firm in 1848, at which point its name was changed to S. S. Edkins & Son'. A few years after S. S. Edkins's death in 1853, the firm was closed."
Still searching, but it seems Edkins is a South African name. Could it be a button from the Boer war perhaps?
Cheers,
Megsy