Italy
Genoa. Biennial Doges gold 1/2 Doppia 1559 AU58 NGC, Fr-420, cf. CNI III-2 (1558), cf. MIR-209/4 (1558). Bearing an unlisted date, this enigmatic gold coin exhibits lovely antique-reddish tone and a clear strike. Unlisted either in the CNI or in Varesi (MIR), this may very well be the only extant example of this date.
Estimate: 2000-2500 USD