Niewmismatic Error Coins

Malaysia 1977 100th Anniversary Of Rubber Commemorative Ringgit Coin With Curved Clip Planchet Error.
Rarity: RRR
Very thankful to Mr. Anthony Tan of Monetarium Singapore for giving me the chance to inherit his collection of this rare Malaysia 1977 100th Anniversary Of Rubber Commemorative Ringgit Coin with Curved Clip Planchet Error.
This is a 1 Ringgit Copper-Nickel commemorative coin, weight measured at 16.80gm with a diameter of 33.40mm and 2.45mm on thickness. It was issued in 1977 with a total mintage of 500,000 pieces. Minted by Franklin Mint.
A clipped planchet or edge bite error coin occurs when a coin is struck on an incomplete planchet. Coin blanks are punched out from strips of metal using a high-speed punch. Sometimes the strip isn't pushed along far enough after the previous blank was punched and this results in a planchet that isn't fully rounded. The resulting planchet has been punched out of the strip where the previous blank was cut, thus leaving a 'bite' out of the blank.The resulting coin after it has been through the minting press has a curved clip on the side of the coin.
This a curved clip errors. Many curved clip error coins are faked by punching the curved clip out with a punch. Collectors should take time to learn the diagnostics of this curved error due to the ease and frequency in which they are faked.
To distinguish between a genuine clip and a man-made version you need to look at the opposing edge of the coin. In genuine edge bites there is a weakness in the rim and on the opposing side of the coin - this is termed the 'Blakesley effect' after an American numismatist who first described it. The weakness results from the rim opposite the clip not being formed fully when it is put through the rimming machine.

Few diagnostics for genuine rim curved clips are:

1. The pole opposite the clip often shows a weak or absent rim. This is the "Blakesley" effect. Special Note: The "Blakesley" effect is not always seen on coins with authentic curved clips which are LARGE.
2. Design elements bordering the clip often show metal flow -- a smearing and stretching out of the design.
3. The exposed edge of the clip will usually show a "belly line" or "breakaway zone". Half of the exposed edge (upper or lower half) will be grainy and the other half smooth.
4. The rim should fade out and taper toward the clip. The Blakesley Effect is a term used to describe inefficient metal flow, opposite a clip on a coin ( "opposite a clip on a coin" it means the effect will be more or less CW/CCW180 degrees around the rim) from the clipped area., when the rim is formed and the subsequent imperfect or incomplete rim formed at that position after striking.

Happy Niewmismatics !!