Reeding
Videos
Reeding or milling is a technique wherein a number of narrow ridges called "reeds" are carved or milled into a surface with a Castaing machine.
Milled edge of a 1951 Hong Kong 50¢ coin
A cabinet with reeded doors
Castaing machine
Videos
The Castaing machine is a device used to add lettering and decoration to the edge of a coin. Such lettering was necessitated by counterfeiting and edge clipping, which was a common problem resulting f
Reeding
…Reeding or milling is a technique wherein a number of narrow ridges called "reeds" are carved or milled into a surface with a Castaing machine. In numismatics, reeded edges are often referred to as "ridged" or "grooved" (American usage), or "milled" (British usage). Some coins, such as United…
A Castaing machine, on display at the American Numismatic Association museum.
Aubin Olivier introduced the coinage press to France.
A 1573 French piedfort produced using a split collar, with its edge lettering shown beneath
A 1701 gold Louis d'or, overstruck using Castaing's method. An older 1690s date is visible on the reverse.