Gemstone and pearl 'Chessmen' brooch, Seaman Schepps, circa 1970, the carved rose quartz rider on a horse beneath a stylised tree is accented with carved and polished emeralds and baroque pearls, the horse's eye a collet-set ruby, mounted in 18ct gold, approximately 52.5 x 27 mm, signed Seaman Schepps, maker's mark for Seaman Schepps, numbered 1792.