33138Christian IV
gold 10 Ducat (Portugaloser)
1623
AU53 NGCEstimate: 100.000 $

33146Frederik III
gold 10 Ducats (Portugaloser)
ND (1668-1669)
MS63S NGCEstimate: 100.000 $

33294Frederik III
gold 10 Ducats (Portugaløser)
ND (1661)
AU Details NGCEstimate: 100.000 $

33044Gaius (Caligula)
(AD 37-41).
AV aureus.
NGC Choice AU 5/5 - 2/5.Estimate: 75.000 $

33085Magnentius (AD 350-353).
AV medallion of 3-solidi.
NGC AU★ 5/5 - 4/5,
Fine Style.Estimate: 75.000 $

33120Charles III
8 Reales 1760/59
NR-JV AU58 PCGSEstimate: 50.000 $

33215George II
gold Proof 5 Guineas 1729
PR63 NGCEstimate: 50.000 $

33249Transylvania.
Georg Rakoczi
gold Restrike 20 Ducat 1631-Dated
MS63 NGCEstimate: 50.000 $

33317Nicholas II
gold Proof 25 Roubles (2-1/2 Imperials)
1896
PR61 NGCEstimate: 50.000 $

33012MACEDONIAN KINGDOM.
Alexander III the Great (336-323 BC).
AV distater.
NGC Choice AUS 5/5 - 5/5,
Fine Style.Estimate: 30.000 $

Archive: People and Markets

Representatives will be accepting NGC and PMG submissions at the Evento Numismático Internacional Madrid 2024.

NGC and PMG at the New Numismatic Event in Madrid

Representatives of NGC and PMG will accept submissions, answer questions and provide information about the companies’ services at the new Evento Numismático Internacional Madrid.

Read more
Photo: Thüringer Staatskanzlei / Jacob Schröter.

Wolfgang Steguweit Receives the Federal Cross of Merit

The renowned numismatist Wolfgang Steguweit has been awarded the Order of Merit of the Federal Republic of Germany. The German President has thus honoured Steguweit’s cultural achievements – and not only in the field of numismatics.

Read more

A New Member to Join the SINCONA Team: Michael Otto

The SINCONA team is excited to welcome a new member. As of 1 January 2025, Michael Otto is working at the SINCONA Group’s headquarters in Zurich. He is looking forward to taking over the position as Head of Numismatics.

Read more
Coiniverse and Swissmint team up to make commemorative coins from Switzerland available via a smartphone app. Photo: Coiniverse / Swissmint.

Swissmint Becomes First eCommerce Partner on Coiniverse

The numismatic smartphone application, founded by the mint of Finland and turned into an independent start-up, aims to become a marketplace for mints and coin dealers around the world.

Read more

Archive: Coins, Medals and more

Background: Kremnica. Photo: Lukkon / CC BY-SA 4.0.

The First Years of Czechoslovak Coinage

SINCONA will auction off an impressive collection of Czechoslovak patterns. The offer includes a pattern for the Wenceslas Ducat of which only two specimens exist. Moreover, the sale features the very specimen of the Wenceslas Ducat that President Mazaryk gave to the family of the murdered Finance Minister Rašín.
Bei genauer Betrachtung können Münzen besondere Merkmale aufweisen, die sich entweder gut oder schlecht auf ihren Wert auswirken. Diese zu erkennen und mit den richtigen Begriffen benennen zu können ist wichtig für jeden Münzsammler. Achtung, Bronzepest kann ihre Sammlung zerstören! Foto: Shutterstock.

Cleaning, Patina, Verdigris etc.: Which Errors Affect the Price of a Coin? – Part 2

The price of a coin does not only depend on its rarity and quality. In the second part of our overview we will talk about wear and tear, cleaning and the consequences of environmental processes.
Search Search