1 Grosso - Francis Mary II Narrow module

Francesco Maria II della Rovere ruled Urbino for half a century but died without a legitimate heir, making him the last Duke — upon his death in 1631, the duchy reverted to the Papal States under the terms of a 1624 agreement with Pope Urban VIII. The "narrow module" designation distinguishes this issue from a broader flan variant struck under the same reign, a distinction tracked in the CNI but frequently overlooked in the trade.