Friedrich Wilhelm, the Great Elector.
Ducat 1686 LCS, Berlin.
Extremely rare.
Attractive piece.


Maximilian II.
Ducat 1855.
Only a few pieces are known.
Extremely fine-uncirculated.

Ferdinand Albrecht I.
Löser in the weight of 4 Reichstalers 1670, Clausthal.
Extremely rare.
Attractive piece.

Friedrich Adolf.
5 Ducats 1711, Detmold.
Only known piece.
Extremely fine-uncirculated.

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.

Johann Adolf, 1590-1616.
Portugalöser (10 ducats) n.d., Eutin.
Extremely rare and of particular
significance in monetary history.
Attractive piece.

Leopold I, 1657-1705.
20 Ducats, n. d. (after 1666), Hall,
by M. König.
Extremely rare.
Almost extremely fine.

Archive: People and Markets
Data Breach During Sale of 2-Euro Coin in Cyprus: How to Avoid Server Crashes
Cyprus wanted to celebrate the 20th anniversary of its EU membership with a 2-euro coin – but the party turned into a fiasco. Even before the start of sales, the server crashed; at times, customers could see the data of other buyers, and to this day, it is unclear whether the central bank will make another attempt to sell the coins.
The World’s Smallest Coin
Now it is official: Croatia’s 1-kuna coin dedicated to the town of Hum holds the Guinness World Record as the world’s smallest coin!
Archive: Coins, Medals and more

Maximilian: The Last Knight and / or a Bankrupt
On 3 July 2025, Künker will auction the Hermann Wohnlich Collection presenting coins and medals from Tyrol. The offer includes an impressive ensemble of representative coins of Maximilian I, which are an excellent testament to his ability to cultivate his image. The effects of this can still be felt today.

The Gnadenpfennig – An Object Between Decoration, Medal, and Coin
Gnadenpfennigs are an extremely rare category of numismatic objects. Künker is proud to offer nine lots in auction 418 on 29 January 2025 that are, or are likely to be, gnadenpfennigs. We explain the purpose of these issues and when they were created.













CIT’s Tiffany Art Metropolis – Seoul
CIT dedicates its fourth issue of the Tiffany Art Metropolis series to an Asian city. Following Paris, Rome and London, in 2024 CIT presents the metropolis of Seoul on the Han River.
Euro Counterfeits: Fraudsters Increasingly Target Commemorative Coins
The number of counterfeit euro coins surged dramatically in 2023, with €2 coins—particularly commemorative issues—being the primary targets. Counterfeiters are employing increasingly sophisticated techniques, while investigators are analysing new varieties to track down illegal minting operations.