Estimate: 20.000 EuroBrandenburg.
Friedrich Wilhelm, the Great Elector.
Ducat 1686 LCS, Berlin.
Extremely rare.
Attractive piece.36
Estimate: 50.000 EuroBavaria.
Maximilian II.
Ducat 1855.
Only a few pieces are known.
Extremely fine-uncirculated.105
Estimate: 125.000 EuroBrunswick-Bevern.
Ferdinand Albrecht I.
Löser in the weight of 4 Reichstalers 1670, Clausthal.
Extremely rare.
Attractive piece.135
Estimate: 100.000 EuroLippe.
Friedrich Adolf.
5 Ducats 1711, Detmold.
Only known piece.
Extremely fine-uncirculated.184
Estimate: 50.000 EuroCity of Nuremberg.
10 Ducats 1630.
Extremely rare.
Extremely fine.198
Estimate: 40.000 EuroCity of Regensburg.
6 Ducats, n. d. (1765-1790), with the title of Joseph II.
NGC MS 62 PL.
Extremely rare.
Attractive piece from polished dies.
Almost uncirculaed.251
Estimate: 125.000 EuroHolstein-Gottorp.
Johann Adolf, 1590-1616.
Portugalöser (10 ducats) n.d., Eutin.
Extremely rare and of particular
significance in monetary history.
Attractive piece.295
Estimate: 200.000 EuroRDR.
Leopold I, 1657-1705.
20 Ducats, n. d. (after 1666), Hall,
by M. König.
Extremely rare.
Almost extremely fine.376
Estimate: 125.000 EuroArchbishopric of Salzburg.
20 Ducats 1687.
NGC AU 58.
Extremely rare.
Extremely fine.423
Estimate: 40.000 EuroVienna.
Salvator medal in the weight of 24 Ducats,
n. d. (after 1843), by K. Lange.
NGC PF 61.
Extremely rare.
Proof.431

Archive: People and Markets

Manfred Dunker Honored as the Founder of Modern Coin Marketing

Manfred Dunker played a decisive role in the creation of MDM and is probably the most influential person in the history of modern commemorative coins. At the World Money Fair 2025, Samlerhuset Group paid tribute to its most important employee.

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Largest Hoard of Ancient Gold Coins Discovered in Luxembourg

At the end of 2019, two amateur archaeologists in Luxembourg made an impressive discovery that has now been made public: 141 exceptionally well-preserved solidi from the last third of the 4th century. It is the largest hoard of ancient gold coins ever discovered in the Grand Duchy.

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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.

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The new website is growing and now includes all our Who’s Who entries.

Our Who’s Who Is Here!

Our entire Who’s Who for numismatists and collectors is now available on our new website. This is another important step on our path towards transitioning from our old to the new site. And there is more!

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Archive: Coins, Medals and more

State-of-the-Art Minting Technology

Colours, special shapes, inlays, micro inscriptions, latent images and holograms – many technologies are used on commemorative coins today. In this article, we give you a little overview of the different technologies that are currently applied in the coin producing industry.

The Suffering of Leiden – A Siege During the Dutch Revolt

The third part of the Beuth Collection that Künker offers in Auction 420 contains many historically interesting emergency and siege coins. They were issued by the Dutch towns besieged by Spain during the 80 Years' War. One of these towns was Leiden, which to this day commemorates the end of the siege every year with a festival.
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