Portugal, Pedro II, countermarked coinage, 250 Réis, a Porto Half-Cruzado of John IV with circular counterstamps on both sides bearing new legends, obv. reading alphonsvs vi d g portvg et alg rex, rev. reading in hoc signo vinces, rev. also countermarked ‘250’ beneath lis, 10.74g (Gomes 111.07). Good very fine, extremely rare £2,000-£2,600

Circular counterstamps of this type almost always bear the name of John IV; those in the name of Alfonso VI are all extremely rare