Niewmismatic Error Coins

Malaysia Parliament House Series 1971 $1.00 (ROYAL MINT UK) Coin With Planchet Lamination Error.
Rarity: RRR

A lamination flaw is a planchet defect that results from metal impurities or internal stresses. Lamination flaws cause discoloration, uneven surfaces, peeling, and splitting. A lamination is a planchet defect caused when a portion of the planchet metal separates from itself due to impurities or internal stresses.

Lamination flaws occur primarily when foreign materials or gas become trapped within the planchet metals as they are being formed. They can be minor or major.
To prepare planchets on which to strike coins, the mint purchases rolls of metal of the correct composition and thickness of the coin to be produced. These rolls are fed through a blanking machine that punches them out into the metal disks on which the coins are struck, which are known as blanks. At this stage, the blanks are go into an upending mill, which gives the blanks an upended rim or upset rim, which is where the rim becomes slightly raised and rounds off to the center of the blanks. Blanks with upended rims are called planchets. A planchet that escapes getting struck (without upending) is known as a blank.

Small laminations are fairly common and do not command a high premium. The larger the lamination and the larger the denomination of the coin, the higher value of the lamination.
Most clad layers are missing before the coin was struck. Coins with missing clad layers are not easy to find. They are not rare, but they are not common. This is why they are in demand.

The key to determine if this is a true error and not plated after it was struck is to weigh the coin. A Copper- Nickel $1.00 of Malaysia Parliament House Series is weight at 17.00gm. A missing a layer with lamination error will weigh less than 17.00grams. In addition, the fine detail should be missing, as well as parts of the letters close to the rim should be weak or mushy.

This is a Royal Mint UK minted Copper- Nickel $1.00 coin of Malaysia Parliament House Series.

The well known Malaysia senior numismatist Mr Saran Singh, the author of world famous "THE ENCYCLOPEDIA OF THE COINS OF MALAYSIA, SINGAPORE AND BRUNEI 1400-1967", mentioned in his book (second edition), our Malaysia very first One Ringgit copper-nickel coin was issued in the year of 1971. Weight:17.00gm, Diameter:33.9mm with total Mintage of 2,378,995 pieces.

However,500,000 pieces was minted by Royal Mint in UK.

Do you know how to differentiate a Malaysia 1971 one ringgit coin minted by Royal Mint of UK or Royal Mint of Malaysia?

Top Coin: Minted In Malaysia. Bottom Coin: Minted In UK.

1)  Royal Mint of UK, with Clear and Neat Strikes on the Lettered edge.
2)  Royal Mint of UK,on the lettered edge,in the wording of "Malaysia",the alphabet "M" are different from the local mint.The center -V shape of the alphabet "M" are taller on the London Mint than the local mint.
3) Royal Mint of UK ,in the wording of  "Malaysia",the alphabet "S" are also different from the local mint.The alphabet "S" are taller on the London Mint than the local mint.
http://dniewcollectors.blogspot.my/2011/02/coin-story-malaysia-one-ringgit-year.html