SINCONA AG

Auctions 103-105
May 18–20, 2026

On 30 October 2025, SINCONA held its 100th auction. To mark the occasion, Ursula Kampmann conducted an interview with founder and CEO Jürg Richter, who has been passionate about numismatics since he was a child.

Ján Oliva (1903–1982) is considered one of the most important figures in Czechoslovakian banking in the first half of the 20th century. Accompanying lot no. 1124 from his estate – part of SINCONA Jubilee Auction 100 – we dedicated the following portrait to him... (German version only)

Press release on SINCONA Auction 96 (26 May 2025): SINCONA British Collection – Part 6 · British Silver and Gold Medals. Ursula Kampmann sheds light on the reign of an admirable, underestimated though, Queen and woman…

In 46 BC, the year that marked the peak of his power, Caesar was not only planning the largest games that Rome had ever seen, but also the most extensive distribution of money. The latter resulted in a lasting transformation of the Roman monetary system…

The coins of the bishops of Basel are always somewhat neglected, or so it seems to collectors, and they may be right about that. Based on a few special features of the coins of the Diocese of Basel, we would like to whet your appetite for a new collector's field… (German version only)

If you are regularly handling ’Vreneli’ gold coins, you will every now and then come across some that display strip-like color alterations across the entire coin. Why is this? (German version only)

The essay confirms the attribution of a medieval Louis II of Vaud Double Tournois to the Nyon mint. A drawing and a photograph provide conclusive evidence... (In German only)

This article highlights some pictorial details of an extremely rare gold medal of 10 ducats from the second half of the 16th century (Kremnica mint). Christof Füessli, a gifted engraver, staged the story of Jonah and the whale in a well-established typological tradition... (German version only)