Italian States, Stato Pontificio (Papal States). Sixtus V BI Quattrino. Montalto mint, 1585-1590. SIXTVS • V • P • M • A, bare-headed bust to left, wearing embroidered cope / MONTALTO, oval coat-of-arms surmounted by crossed keys and triple crown. MIR 1384/1; Muntoni 136; Berman 1387. 0.69g, 16mm, 6h. Very Fine.