Restraining Collar
A restraining collar that made completely round coins possible.
Close collar minting is a method of coin manufacture that is used almost exclusively today. With close collar minting, the planchet is centred within a solid metal collar during the minting process. This restraining collar prevented the expansion of the planchet sideways and outwards and thus made it possible to mint completely round coins for the first time. These could also have a slightly raised edge (edge bar) and an edge inscription without additional milling. The edge minting made possible with the new technology is not only difficult to forge; it also increases the circulation security of the coins, since coin clipping is very easily noticed. A pearl circle often adjoins the edge bar on the inside.
- Primary Target
- Diclonius Subjects (including Mariko)
Lore & Background
Close collar minting is an invention of French medalist and engraver Jean-Pierre Droz (1746–1823). Its prototype of a functional minting machine had a six-part minting ring. Close collars were used for the first time in the new Soho Mint. In Germany, Prussia systematically promoted such coinage via the German Customs Union from the middle of the 19th century.
In Their Own Story
The source does not provide a narrative story about the restraining collar. It describes the technical history and advantages of close collar minting, including the role of Jean-Pierre Droz and the first use at the Soho Mint, but no specific characters or events are mentioned.
Reader's Guide
The restraining collar in close collar minting is a solid metal collar that holds the planchet during striking. It prevents the planchet from expanding sideways and outwards, ensuring the coin is completely round. This collar also allows for a slightly raised edge (edge bar) and edge inscriptions without additional milling. The edge minting makes forgery difficult and increases circulation security because coin clipping is easily noticed. A pearl circle often adjoins the edge bar on the inside.
Did You Know?
- Close collar minting is used almost exclusively today for coin manufacture.
- The invention is credited to French medalist and engraver Jean-Pierre Droz (1746–1823).
- Droz's prototype minting machine had a six-part minting ring.
- Close collars were first used in the new Soho Mint.
- Prussia systematically promoted close collar coinage via the German Customs Union from the middle of the 19th century.
More in Powers & Artifacts
Elsewhere in the Elfen Lied universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record