Quattrino - Guidobaldo I of Montefeltro Tall bust

Guidobaldo I inherited Urbino from his father Federico da Montefeltro in 1482 at age ten, and his reign was anything but stable — Cesare Borgia seized the duchy outright in 1502, forcing Guidobaldo into exile. He was restored the following year through a combination of papal politics and popular support, but the interruption almost certainly disrupted mint operations, and attributing specific quattrino dies to either side of that gap remains unresolved. CNI XIII lists five specimens under this type, a tight cluster that reflects the low survival rate for base-metal Urbino coinage generally.