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
New Coin From Slovakia: 80th Anniversary of the Vrba-Wetzler Report
In the summer of 1944, the world became aware of the Holocaust thanks to two young Slovaks: Rudolf Vrba and Alfréd Wetzler. The National Bank of Slovakia honors them with €10 collector coin, produced by the Kremnica Mint. The coin represents many things – bravery, moral courage, responsibility and the power of public opinion.
Switzerland is “Guest of Honor” at the World Money Fair 2025
Next year, Switzerland will be the guest country at the World Money Fair. The Federal Mint Swissmint has a very special highlight in store for the fair: it will be presenting the 100-franc Gold Vreneli anniversary coin to the world for the first time.
Archive: Coins, Medals and more

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.

Counterfeit Detection: Altered Prussia 20 Mark
An NGC expert gives us insight into his everyday life. He shows how the year on a coin from the German Empire was altered by a coin doctor.













Petition Crown Realizes More than $1 Million, Setting Record
For the second time this year, an example of England’s Petition Crown certified by NGC has realized a record price. The piece from the Geoffrey Cope Collection broke the $1 million barrier.
Friedrich Popken (1940-2024)
On 27 July 2024, Friedrich Popken passed away at the age of 84. As well as being a well-known entrepreneur, he was also a highly esteemed coin collector who supported and promoted many numismatic projects. An obituary by Fritz Rudolf Künker.