LOOSE CHANGE: APRIL 5, 2026

Coin technology and design have made major strides in recent years. A prominent example is Germany's introduction of polymer-coated coins. Since 2016, the Federal Republic has issued €5 commemorative coins featuring a colored polymer ring, followed in 2019 by €10 coins with a transparent polymer ring. These innovative pieces combine metal and plastic, enhancing both security against counterfeiting and visual appeal. But what comes after the polymer ring?

In recent years, mints around the world have introduced a wide range of innovations that enrich both the technology of coin production and the design of circulation and collector coins. Here is an overview that looks at new materials, security features, striking technologies, and design methods that have been implemented in series production since 2020—not mere prototypes or decades-old concepts revived on paper

Laser-Engraved Micro Features
Since 2020, modern coins have increasingly incorporated microscopic structures for anti-counterfeiting, made possible by precision laser-engraving processes. One pioneer is the 2021 Britannia bullion coin from the Royal Mint, equipped with four new security features. These include a latent image that shifts between a padlock and Neptune's trident depending on the angle, like a holographic effect. The coin also carries micro-lettering that encircles the figure of Britannia with the Latin inscription "DECUS ET TUTAMEN" (an ornament and a safeguard), rendered in tiny text that is barely visible to the naked eye. A further innovation is a laser-generated surface pattern that makes the background appear as moving waves when the coin is tilted in the light.

This "surface animation" is created using nano-engraving with ultra-short picosecond laser pulses that cut grooves into the dies up to 200 times thinner than a human hair. The Royal Mint was one of the first mints to deploy such high-resolution lasers, which are otherwise used in fields like medicine and aerospace. The result is a set of security elements (latent image, micro-text, dynamic lines) that are visually compelling and extremely difficult to reproduce with conventional methods. Similar micro-engraving techniques are now used worldwide; many countries equip circulation coins with tiny laser-applied marks, images, or text because, once the process is set up, they can be mass-produced on standard presses yet remain very hard to imitate.

To read the complete article, see:
Innovations in Numismatics: What Comes After the Polymer Ring? (https://www.numismaticnews.net/innovations-in-numismatics-what-comes-after-the-polymer-ring)

 

Proposed obverse and reverse designs for the Proof and Uncirculated gold $5, silver dollar and copper-nickel clad half dollar coins in the legislated 2027 Working Dog commemorative coin program were considered and recommended by the Citizens Coinage Advisory Committee.

Commemorative coins are authorized by laws approved by both houses of congress and the president. This 2027 commemorative coin program is authorized under provisions of the Working Dog Commemorative Coin Act, Public Law 118-109 signed by President Joe Biden on Nov. 25, 2024.

The coins recognize the service of military and law enforcement K-9s and service animals in the private sector.

The law mandates production and release of up to 50,000 gold $5 coins; 400,000 silver dollars; and 750,000 copper-nickel clad half dollars.

To read the complete article, see:
CCAC sticks with Mint coin themes (https://www.coinworld.com/news/us-coins/ccac-sticks-with-mint-coin-themes)

 

A priceless ancient golden helmet from Romania stolen last year from a museum in the Netherlands has been recovered, Dutch authorities announced Thursday.

Under the guard of heavily armed, balaclava-clad police, prosecutors unveiled the 2,500-year-old Cotofenesti helmet, one of Romania's most revered national treasures from the Dacia civilization, during a news conference in the eastern Dutch city of Assen.

"We are incredibly pleased," Corien Fahner of the prosecution service told reporters. "It has been a roller-coaster. Especially for Romania, but also for employees of the Drents Museum."

To read the complete article, see:
A 2,500-year-old golden helmet, stolen in a museum heist last year, has been recovered (https://www.cnn.com/2026/04/02/style/golden-helmet-dutch-museum-recovered-intl)

To read the earlier E-Sylum article, see:
EXPLOSION AND THEFT AT DRENTS MUSEUM (https://www.coinbooks.org/v28/esylum_v28n04a23.html)

	NBS (coinbooks.org) Web