Irish silver marks follow unique traditions distinct from English hallmarking, reflecting Ireland's independent silversmithing heritage and regulatory systems.
Dublin's assay office, established in medieval times, uses distinctive marks including the crowned harp and specific date letter systems that differ from English practice.
Irish silver traditionally used the sterling standard (925) but with marking systems and symbols unique to Ireland, including the Hibernia duty mark.
Silver made outside Dublin, particularly in Cork and other centers, may bear different marks reflecting local traditions and marking authorities.