Watch List notes:

Poland, John II Casimir (1648-68), Half-Ducat, 1.71g, 1662, ioan. cas. rex., laureate head right, .a.t., belowrev. mon. avrea. - reg. pol. 1662., shield on eagle, mint master's mark dividing legend below (F.-; HCz.5916 - R6), lightly creased, extremely fine, very rare.
provenance
Coin Galleries, New york, 9-10 November 1962, lot 372, $120
Estimate: £8,000.00 - £10,000.00