2023 Germany €20 Silver Coin Issue "Wilhelm Schickard's Calculating Clock 400 Years"

• Mint: Munich (D)
• Denomination: €20
• Quality: Proof/UNC
• Limit: 120,000/N/A
• Alloy: 92.5% Sterling Silver
• Diameter: 32.5 mm
• Weight: 18 grams
• Design: Florian Huhoff
• Box/Capsule: No/Proof only
• Certificate: Proof in printed folder
• Edge Lettering: "MACHINAM EXTRUXI QUAE DATOS NUMEROS COMPUTET X" ()

Additional Information

Please click here for an external web page in English!

This issue marks the 400th anniversary of the invention of the first mechanical calculator that could perform all four basic arithmetic operations. The device was the brainchild of astronomer and mathematician Wilhelm Schickard (1592–1635), who in 1623 successfully demonstrated that the central mechanism of his calculating machine was capable of adding and subtracting numbers of up to six digits.

Today, replicas of the machine are in the Stadtmuseum Tübingen and in the computer museum of the Wilhelm Schickard Institute.

The reverse has the German eagle, the words “BUNDESREPUBLIK DEUTSCHLAND”, the value and denomination, the letter “D” for the Munich Mint, the year 2023, and the twelve stars of Europe.