The 10 cruzados piece, estimated at £20,000-30,000 at Noonans.

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An event with more than 40 years of history, it is organised by the British Numismatic Trade Association for its members and other guests.

A total of 45 exhibitors are named for this outing with the cream of the UK numismatics trade turning out alongside European dealerships and auction houses.

Coinex opens at 1pm on September 23 with ‘Bourse Rights’ and an admission fee of £30 with admission the following day costing £5. However, as has become the norm, in the days immediately before and after the fair, a raft of complementary auctions is planned by many of London’s specialist firms including Spink, Roma Numismatics, Noonams, Sovereign Rarities, Baldwin’s, St James’s Auctions plus relative newcomer Harmers.

Detecting the new world

Struck c.1500 in Lisbon from Guinean gold provided by the explorations of Vasco da Gama, the 10 cruzados piece or Portugués do ouro of Manuel I (1495-1521) is a coin synonymous with the Age of Discovery.

The motif of the cross with the slogan In hoc signo Vinces (By this sign, thou shalt conquer) became the rallying call for Portuguese territorial expansion.

This very well preserved example was an unusual metal detecting find in Wiltshire, found earlier this year in the small village of Etchilhampton. It has an estimate of £20,000-30,000 at Noonans’ mixed owner sale of Coins & Historical Medals on September 28-29.

As part of its Coinex series Noonans will also sell both the Francis Bartlett collection of English groats and a single-owner sale of Irish hammered coins on September 27.

Wyon’s Gothic greatness

Designed by William Wyon, the 1847 Gothic silver Crown is considered one of the most spectacular designs in the entire British milled series.

Proof Gothic Crowns with the lettered edge were limited to a mintage of only 8000 pieces with this example in a near mint state graded and slabbed by NGC as PF 63.

It is priced at £28,500 by Hampshire BNTA member Wessex Coins at Coinex.