Expertise
Imperat in toto regina pecunia mondo
The motto of Duke Frederick I of Saxe-Gotha-Altenburg (1649–1691) is just as relevant today as it was almost 400 years ago. Even though the appearance and nature of money has changed significantly in almost 3,000 years, from the Lydian gold stater to the pennies of Charlemagne and the taler currency to today's paper money, money is still a means of exchange, a benchmark and a guarantee for our modern world. Even everyday cashless payments cannot replace the significance and value of gold and money. Numismatics – a specialised field of historical research – is therefore not only important for archaeologists, historians, economists and culture enthusiasts, but also part of our everyday lives.
However, the monetary system in the various sciences only shows one side of the coin. At SINCONA AG, we also associate it with the passion of collecting. It doesn't matter which area of collecting we choose. When we finally hold the piece we have been waiting for in our hands, we experience a feeling that only enthusiasts can understand. Many of our customers are specialists in their field and therefore have a lot to talk about. SINCONA AG supports this passion, because we numismatists are also all passionate coin enthusiasts.

Phone: +41 44 215 10 93Email:

Phone: +41 44 215 10 95Email:

Phone: +41 44 215 10 92Email:

Phone: +41 44 215 10 98Email:

Phone: +41 44 215 10 96Email:

Phone: +41 44 215 10 97Email:
What is your coin, medal or banknote really worth? Our experts will be happy to provide you with a competent and fair market appraisal of your coins, banknotes, medals or other numismatic objects.
We determine the appraisal fee on an individual basis depending on the size and value of a collection. If you decide to sell or consign your items to us, we will of course refund the fee. Rough estimates are free of charge: we can quickly check whether your items are high-value numismatic items. Simply send us a photo of the front and back by email or WhatsApp.
We are constantly seeking rare and valuable coins, medals, banknotes, and interesting phaleristic orders and decorations for our international clientele. We welcome both individual items and complete collections, and guarantee fair, competitive prices and prompt, discreet service.
As a renowned auction house, we also hold internationally acclaimed auctions twice a year. We will be happy to include your items in our catalogue and sell them at auction to the highest bidder. Consignment is absolutely straightforward.
We are pleased to draw on our many years of experience to advise you personally and provide expert answers to your questions about coins and other numismatic objects.
Would you like to purchase coins or banknotes from an auction house somewhere in Europe or overseas? Contact us: we attend many auctions in person and are happy to execute your auction orders professionally and discreetly. We also use our long-standing international network of contacts to successfully bid for the items you want.
The experts at SINCONA Group combine decades of experience with a passion for numismatics and precious metals – day in, day out.
They are the authors of numerous leading numismatic publications and regularly share exciting facts and insights from their respective fields in articles, essays and papers. We are delighted to take you on exciting journeys through the rich history of coins, banknotes, medals and other numismatic objects with our carefully researched publications and up-to-date press releases.
SINCONA AG
Personalised advice: We guarantee expert personal advice and strive to build long-term customer relationships.
Auction venue Zurich: Zurich has been one of the global hotspots for numismatics for decades. At our headquarters on Zurich's Limmatquai, we personally welcome you to our centrally located auction room.
International clientele: Our auctions reach collectors around the globe.
Expertise: Our experts share your passion for numismatics and have years of experience and comprehensive specialist knowledge.