This Great Britain mule is exceedingly rare. It is a proof-only date and even rarer as a mule with the threepence obverse.
GREAT BRITAIN.Victoria.1862 AR Fourpence Muled with Threepence Obverse. PCGS PR65. Edge: Plain. VICTORIA D:G: BRITANNIAR REGINA F:D:. Head left / Britannia seated right. KM 731.1 Variant; ESC-3357 (1955B).