07.10.2025Caesar at the Turning Point and the Introduction of Roman Gold CoinageSINCONA’s Auction 101 on 27 October 2025 features an extensive and highly interesting collection comprising284 lots of ancient coins. These include numerous exquisite aurei, beginning with a small series of three aureiissued by Caesar in 46 BC. These three aurei provide the perfect opportunity for us to recount the story of Caesar’squiet coinage reform of 46 BC: the sheer volume of gold coins minted in his name at that time resulted in a lastingtransformation of the Roman monetary system. Article by Ursula Kampmann (PDF)
01.07.2025Wanted: 100 Francs 2025For our customers, we are currently looking for the commemorative coin on the 100th anniversary of the 100 francs 1925, which went on sale on July 1, 2025, for our customers until demand is covered.Please contact us immediately if you have the new 100 Francs 2025 to offer. Contact us!
October 27-30, 2025, Zurich (CH)SINCONA Auctions Fall 2025 (including SINCONA's 100th anniversary auction) more information
Auctions We hold two internationally renowned auctions twice a year in Zurich, offering our customers a large selection of coins, banknotes, medals, etc. We encourage your participation, whether as buyer or consignor. Further information
Purchase We constantly seek coins, medals and notes for our customers. We shall gladly accept individual pieces, as well as entire collections. Further information
Estimations We produce professional and market-aligned estimates upon request. Needless to say, such estimates always represent specific purchase offers. Further information
Coin Lending Are you temporarily low on cash albeit unwilling to part with your treasures? Learn more about coin lending! Further information
Precious Metals Trading Would you like to buy or sell gold, silver or other precious metals as bars or coins at the best price? Further information
Safe Deposit Boxes Store your valuables and important documents in a safe, discreet, and insurable manner in the safe-deposit boxes of SINCONA TRADING AG, accessible at all times at a prime location in Zurich. Further information