Very nice quality, early 20th century, dress button with a mother of pearl top surrounded by a white enamel border, pierced by a blue paste stone in the centre. Gold rim and back, with loop shank. The back is stamped 15 in a diamond lozenge. The 15 stamp was widely used in the UK from the mid 19th century up to 1932, and indicates 15 carat gold (625), though without the Assay office stamp this is not guaranteed as gold. Slight rust mark to edge of the pearl, otherwise good condition

Size 9/16” (1.4 cm)