The term "milled coin" refers to how it's struck rather than what appears on the edge. A "milled" coin is simply one that's struck by a machine. That's in contrast to a "hammered" coin which is made by manually striking the coin between two dies. Hammering is a very old technique and is no longer used because it's extremely slow, labor-intensive, and error-prone.
You may be thinking of the term "reeding" which is sometimes conflated with milling. Reeding describes the addition of ridges, grooves, etc. to the edge of a coin. Traditionally reeding consisted of a series of fine, evenly-spaced ridges running all the way around the edge. Reeds were added to precious-metal coins to discourage a form of theft called coin-shaving.
When gold and silver coins had smooth edges, criminals would use a file or knife to remove a small amount of metal all the way around the edge. If a crook shaved enough coins they could accumulate a profitable amount of metal while still spending the coins at their original value. Done carefully, shaving would be difficult for the average person to detect because coins would still be circular and only slightly lighter. Coin-shaving dropped significantly when reeds were added, because any attempt to remove metal from the edge would be almost immediately detectable.
Today reeds are still used on coins but for different reasons. Some coins that were formerly silver (e.g. US and Canadian dimes, quarters, and halves) have reeds simply out of tradition. Other countries use specialized reeding to make coins easier to identify by touch, as a help for people who have visual impairments. For example, some EU coins have closely-spaced reeds while others are wide, and still others have "interrupted" reeds that alternate with smooth stretches.
The milled edge on 10p coins serves both functional and aesthetic purposes. Functionally, it helps prevent counterfeiting by making it more difficult to replicate the coin accurately. The milled edge also provides a tactile feature that can help distinguish the coin from others. Additionally, it adds to the coin's durability by reducing wear from handling.
The only George III coins with Britannia on the reverse are the Twopence, Penny, Halfpenny and the Farthing, but none of them had a milled edge. From 1797, the Penny was 36mm in diameter, the Twopence was 41mm in diameter and both coins were made from copper.
There are a number of ways that people have referred to it but the two most common is known as reeding or a reeded edge or milling and a milled edge.
From 1969, the Australian 50 cent coin, when it was reintroduced, had 12 sides so that there was a good visual distinction between the 50 cent, and the 3mm smaller 20 cent coins, and you could also feel the difference between the two coins.
All British 5 Pence coins have a milled edge. The larger pre-1991 5 Pence coins were withdrawn from circulation and demonetised in 1991. So, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they have little or no value.
No. The round silver Threepence is too small a coin to have a milled edge.
Another difference was that the 20-cent coins had a smooth edge while the other silver denominations featured a reeded, or milled, edge. Therefore 'none' is the answer.
The lines on the edge of a coin are called "Milling" or "Reeding". These days, it has a decorative function. In the old days, it was done to prevent "clipping", which is the shaving off of the precious metal used to make the coin. Many countries produce coins with a "milled" or "reeded" edge.
At 11mm in diameter, Silver Pennies were too small to be milled, they had a plain edge.
The grooves or lines on the edge of a coin are called "Milling" or "Reeding". These days, it has a decorative function. In the old days, it was done to prevent "clipping", which is the shaving off of the precious metal used to make the coin. Many countries produce coins with a "milled" or "reeded" edge.
The term "milled coin" refers to how it's struck rather than what appears on the edge. A "milled" coin is simply one that's struck by a machine. That's in contrast to a "hammered" coin which is made by manually striking the coin between two dies. Hammering is a very old technique and is no longer used because it's extremely slow, labor-intensive, and error-prone. You may be thinking of the term "reeding" which is sometimes conflated with milling. Reeding describes the addition of ridges, grooves, etc. to the edge of a coin. Traditionally reeding consisted of a series of fine, evenly-spaced ridges running all the way around the edge. Reeds were added to precious-metal coins to discourage a form of theft called coin-shaving. When gold and silver coins had smooth edges, criminals would use a file or knife to remove a small amount of metal all the way around the edge. If a crook shaved enough coins they could accumulate a profitable amount of metal while still spending the coins at their original value. Done carefully, shaving would be difficult for the average person to detect because coins would still be circular and only slightly lighter. Coin-shaving dropped significantly when reeds were added, because any attempt to remove metal from the edge would be almost immediately detectable. Today reeds are still used on coins but for different reasons. Some coins that were formerly silver (e.g. US and Canadian dimes, quarters, and halves) have reeds simply out of tradition. Other countries use specialized reeding to make coins easier to identify by touch, as a help for people who have visual impairments. For example, some EU coins have closely-spaced reeds while others are wide, and still others have "interrupted" reeds that alternate with smooth stretches.
no not all us coins are milledMoreThe more common term today is "reeded"; for some reason "milled" has fallen out of use in the last 150 years or so. For current US coins: Cents and nickels have smooth edges.Dimes, quarters, and halves are reededDollars have "lettered" edges which are smooth but include things like mottoes, the date and mint mark, etc.Reeding was originally used to make it easier to detect removal of metal from a coin's edge. Criminals would take a small bit from each coin; added together it amounted to a lot of stolen gold or silver.Reeding on US and Canadian coins continues today as a matter of tradition. Other countries use variations on reeding such as circumferential grooves and interrupted reeds to make it easier for visually-impaired people to distinguish coins by touch.