Watch List notes:

Italy, Livorno, Cosimo III de Medici (1670-1723), Mezzo Tollero, 1683; AR (g 13,01; mm 37; h 6); COSMVS III D G MAG DVX ETRVRIAE VI, coronated bust r., below, 1683, Rv. PRAESIDIVM ET DECVS, ship r., below, LIBVRNI, 1683. CNI 18-20; MIR 75.
Very rare, cabinet tone, good very fine.