Image Missing: Hearst Museum object titled Knocker, accession number 7-587, described as (a) Door knocker, iron, heart-shaped with incised radiating lines at bottom, pivoting on spike with hole at end; extended length 12.6 cm x width (handle) 7.7 cm; (b) escutcheon plate for above, iron, round, with four comma-like perforations; diameter 7.3 cm