milling mark: a contact mark on a coin caused by the reeded edge of another coin.
minor variety: a difference between two coins that is insignificant.
mint: the official government building where coins are struck.
Milling mark - A series of two or more small nicks on a coin which result from contact with the reeded edge of another coin, usually in a mint bag.
milling mark A mark that results when the reeded edge of one coin hits the surface of another coin. Such contact may produce just one mark or a group of staccato-like marks. See also reeding mark(s).
milling; milled coin: Milling refers to the devices on the edge of a coin; a milled coin is one struck by machine. They are related due to the rise of the importance of the collar with machine-produced coinage.
milling mark
A mark resulting from the reeded edge of one coin hitting the surface of another.
mint ...
Milling
See Reeded Edge or Graining - the serrations on the edge of a coin impressed by the collar die.
Mint lustre ...
MILLING
An incorrect term commonly used as a synonym for graining.
MILLING MACHINE ...
Chevron Milling - A coin with chevron shaped edge milling as opposed to the usual small straight ridges. Not widely used today but originally intended to deter counterfeiting.
Millingen (J.).
Recueil de quelques Médailles grecques inédites. Rome, 1812.
Ancient Coins of Greek cities and kings. London, 1831.
milling; milled coin
In coin collecting terms milling refers to the devices on the edge of a coin; a milled coin is one struck by machine. They are related due to the rise of the importance of the collar with machine-produced coinage.
Narrow and Coarse Milling, different diameters (1862-1876)
The 1/4-Rupees minted in Calcutta 1862-1878
have no mint mark.
They have a diameter of 19.3-19.4mm and have a coarse milling. The 1/4-Rupees minted in Bombay 1862 and 1875-1876 ...
It is likely to have been struck in a one-piece collar, but it will have received "thread milling" on its edge while still in the planchet stage.
Finely milled edge, typical of the Philadelphia Mint gold coinage of these years, and not the coarse milling of the Charlotte Mint.
They are referred to as milled dollars because the planchets were made on a milling machine giving a uniform size and mass. Before 1732 8R coins were created by hammering the design onto irregularly shaped cobs cut from silver bars.
Coin clipping is why many coins have the rim of the coin marked with stripes (milling or reeding), text (engraving) or some other pattern that would be destroyed if the coin was clipped.
From 1739 the edge was made with a chevron pattern rather than the normal diagonal milling of the time, as there was a gang of filers in action. There is also a pattern George II two guineas dated 1733.
No two guinea pieces were minted after 1753.
Apollo Kitharoedos.
[Millingen, Recueil, T. II. 11.]
ΠVΘΙΑ The three mountain-peaks of Mt. Parnassus.
Æ 1.0 ...
Blank Planchet - The round disk (Type I Blank) cut from strips of rolled metal which are fed trough a milling machine which puts a slight rim on the coin (Type II Blank).
The inner, or "dump" is made very much like an ordinary coin blank, except for the special milling applied to the edge.
The term "milled" refers to the fact that the coin blanks (planchets) were made on a milling machine and were of consistent weight and size.
The blank disk of metal before it is struck by a coining press which transforms it into a coin. Type I planchets are flat. Type II planchets have upset rims from the milling machine, these to facilitate easier striking in close collars.
Probably not. Just because you cannot see the seam doesn't mean it isn't there. Machinists (and lots of other people) have access to precision milling machines, epoxies, and other tools to make near-perfect "magician's coins." ...
Anything worse, and I would have to mention the most prominent defect in my grade description of that coin. (For example, a mint state coin slightly worse than the one pictured here could be described as "MS-60, scratches" or "MS-60, heavy milling ...
With machining, lathes, milling machines, planing machines and drills are used to cut the cold metal to shape. With fabrication, sheets of metal are cut with guillotines or gas cutters and bent into shape.
annealing furnaces to soften them and then through tumbling barrels, rotating cylinders that contain chemical solutions to clean and burnish the metal. Next, the blanks are washed and put into drying machines. Then the blanks go through milling or ...
In 1830, Joseph Whitworth developed the standard screw gauge and a machine that could measure to one-millionth of an inch, which made possible the production of more precise machine tools for planing, gear cutting and milling.
In the process, the metal becomes stained so the blanks are washed in acid, followed by hot water, after which they are dried. In the next stage, the blanks pass through a milling machine which thickens the edge of the planchet and produces the ...
 See also: Coin, Silver, Mint, Struck, Coinage
  
|
RSS
