Watch List notes:

USA (New Orleans mint), half dollar seated Liberty, 1856-O, doubled "56," NGC SS Republic Shipwreck Effect. Some pre-sinking wear evident on Liberty but well-detailed with clearly visible doubled 56 in the date, better reverse with some original luster remaining. NGC #1797931-012. With original salvager's certificate and "SS Republic: 1853-1865" DVD. S.S. Republic, sunk in 1865 off Georgia

Estimate: $300-450