1442-58 Italian States Gold Sesquiducato or 1½ ducato NGC MS-63+ Alfonso of Aragon, Gaeta or Naples Mint

In the winter of 1443, Alfonso of Aragon — Il Magnanimo, The Magnanimous — rode in triumph through the gates of Naples, ending one of the most dramatic contests for power in Renaissance Italy and inaugurating one of the great courts of the fifteenth century. This sesquiducato, a one-and-a-half ducat piece of exceptional rarity, was almost certainly among the first gold struck under that new Aragonese order. Its obverse bears the quartered arms of Aragon and Naples — the genealogical argument for a crown rendered in gold — while the reverse carries Alfonso himself, armored and mounted, sword in hand, in the ancient manner of Roman imperial coinage, with the legend DNS M ADIVTOR ET EGO DESP IN M: The Lord is my helper and I shall look down upon mine enemies. In the left field behind the mounted king stands a single large letter B — the mark of Jacopo Baboccio da Piperno, mintmaster documented in 1443, now believed to have personally overseen the transfer of the mint from the siege stronghold of Gaeta into the capital itself. This coin may mark the precise administrative moment that transfer occurred.

The sesquiducato denomination is of itself an extreme rarity — struck not for commerce but for the purposes of a sovereign announcing himself to a new kingdom, and surviving in vanishingly small numbers. MEC XIV does not list it outright, acknowledging it only in commentary; Pannuti-Riccio, MIR, and Vall-Llosera confirm its exceptional scarcity. This example is offered in Choice Mint State MS-63+, virtually as struck, preserving the full crispness of Baboccio's dies and the bright yellow surface of newly refined Aragonese gold. The combination of denomination rarity, foundational historical moment, resolved mintmaster attribution, and preservation of this quality makes this among the most significant pieces of Aragonese Neapolitan coinage likely to appear in a generation.