Royal Artillery 1915 Hm silver heart crossed arrows sweetheart brooch

A very unusual original First World War period 'Royal Artillery sweetheart brooch', small delicate hollow silver heart bearing Crowned artillery gun badge with 'Ubique' scroll above and 'Quo fas et gloria ducunt' scroll below mounted on crossed arrows; the reverse impressed with Birmingham silver hallmarks for 1915 and maker's details 'C&S' and 'QMS'. Very good condition, complete with original pin fittings.Size approx 40 x 16mm.