A vast coin collection, much of which was buried underground for more than 50 years, is expected to fetch in excess of $100 million at auction, according to experts. The Traveller Collection ...

A 100-ducat coin of the king, also minted in 1621, sold for $2.2 million in 2018, a record for a Polish coin. Numismatica Ars Classica is offering an estimate of CHF 450,000 ($511,000).