Niewmismatic Error Coins

Malaysia Bunga Raya Series Coins 2005 VS 2009 10 Coins With "CUD" Error.
Rarity:RRR
A "Cud" Error on a Coin
Error coins sometimes show a raised, unstruck area resulting from a break in the die, which is known as a "cud" mark and it touches the rim.
A cud is a damaged area resembling a blob on the surface of a coin which is raised above the field, and which obliterates the device or inscription where it appears. Cuds are the result of die cracks which have become severe, or from die chips where part of the die surface has become damaged and broken away.
Some collectors in the error-variety hobby insist that for the blob to be called a "cud", the damaged part of the die must include part of the edge of the die. Although this is the purist definition, in common parlance you'll see the term "cud" used to describe the blob created by any die chip or serious die crack, regardless of its placement on the die or coin.
Very small cuds are not usually valuable unless they appear on Proof coins. Cuds which can be seen by the naked eye are usually worth a small premium over normal value.

However a major die break with a big "CUD" can command a good premium. I have came across more than 10 pieces of Malaysia Bunga Raya Series 2005 10 sen with a similar major "CUD" at 7 to 10 o'clock position on the reverse. It is a very good specimen of a "CUD" error coin.The cud on the Bunga Raya 10 cents 2005 coin  in our picture is quite spectacular. If you look closely, you can see the effects of the die break on the obverse (front side) of the coin.
Read more: http://dniewcollectors.blogspot.com/2011/10/major-die-break-or-cud-errors.html#ixzz3TKtEyeCo