Carl D wrote on Jan 17
th, 2025 at 12:17pm:
Looks like a stack of coins to me.
US coins, actually.
I can just make out part of "UNITED STATES OF AMERICA" on the top coin but it's a 'reversed' (mirror) image.
So, my question is - what is the point of this thread?
(I'm sure I will be sorry I asked).
I think he might be asking about the ridges on the coins.
It's called '
reeding'.
Coin reeding is the process of adding a pattern to the edge of a coin to prevent counterfeiting and clipping:
PurposeReeding makes it harder to clip coins, which is the practice of shaving off the edges of coins to steal the precious metal. Reeding also helps prevent counterfeiting.
TerminologyReeded edges are also known as "ridged", "grooved", or "milled".
HistoryIsaac Newton introduced reeding in 1698 while he was the warden of the Royal Mint. England began minting coins with reeded edges to combat the practice of clipping, which was common in 17th-century Europe. The U.S. Mint followed suit when it was founded.
Benefits
Reeding also helps people who are visually impaired identify different coins by touch.
Examples
Many coins have reeded edges, including US quarters and dimes, 1 euro, and Australian 5, 10, 20 cents, 1 and 2 dollars.