Watch List notes:

Italy, Firenze, Cosimo III de Medici (1670-1723), Mezza Piastra, 1676; AR (g 15,53; mm 37; h 6); COSMVS III D G MAG DVX ETRVR VI, cuirassed bust r., Rv. S IOANNES BAPTISTA FI ZACHARIAE, Saint Giovanni, nimbate, kneeling r., holding long cross on shoulder; at r., Saint Zaccaria blessing him; in ex., 1676. CNI 10/4; MIR 331.
Very rare, old cabinet tone, about extremely fine.