Silver button, Arts and Crafts style, back marked with a coronet and the acronym DSCG which stands for Duchess of Sutherland Cripples Guild, originally established in 1898 as the Newcastle Cripples Guild. (Reference: British Medical Journal article 9/21/1901; Duchess of Sutherland Lady Millicent Fanny St. Clair-Erskine, 20 October 1867 – 20 August 1955). The ceramic center is likely by Ruskin Pottery. Reference link: Copper buttons with the same back mark ( https://wrba.us/buttons/dscg-silver-with-ruskin-center/
DSCG Back marked silver with Ruskin center. See its back mark on the Button Album public page at WRBA.us. Reference links include the British Medical Journal 1901 article courtesy of PubMed Central® (PMC) on the Guild and on Ruskin Pottery.
This humble broken button allows an inside view of its construction. Two layers of cardboard to provide its thickness, and what appears to be a sheet metal in between for strength. side view showing layers back of the button