Charles Horner Sterling Enamel Lapel Pin Brooch Shamrock Clover. by silversmith Homer, major in art nouveau and arts and crafts jewelry in GB. sterling silver, finished in vitreous glass (kiln-fired). 1 5/16" by 3/8", safety pin closure. signed "C.H" , full Chester assay marks (Horner more often used the Birmingham assay office). The year letter appears to represent 1909. does not appear in Tom Lawson's book on Horner's work, but there are a few quite similar pieces on pg 65.