WRONG METAL,PLANCHET AND STOCK ERRORS.

Malaysia Planchet Errors:Wrong Metal,Wrong Planchet And Wrong Stock.

Rarity:RRRR

Wrong metal, planchet, stock:

 

Malaysia.Wrong Metal, Planchet, Stock Errors.Obverse.
(Dickson Niew Collection)

A wrong metal error is struck on a planchet intended for a denomination of a different composition. This includes a Malaysia 10 Cents cent coins struck on a One cent planchets, 20 cents on a copper planchet , and higher denominations with bigger planchet struck on smaller planchets of different metal. 
Link:
http://dniewcollectors.blogspot.com/2011/08/malaysia-coins-planchet-errorswrong_14.html

Malaysia.Wrong Metal, Planchet, Stock Errors.Obverse.
(Dickson Niew Collection)

A second type is the wrong planchet error, defined as a coin struck on a planchet of the correct composition, but the wrong denomination. These include Malaysia 10 cents coin struck on a 5 cents  planchets, 20 cents struck on a 10 cents planchets, and 50 cents struck on a 20 cents planchets.

Malaysia.Wrong Metal, Planchet,
Stock Errors.Obverse.
(Dickson Niew Collection)

A third type is the wrong planchet stock error. It occurs when clad coinage strip rolled to the thickness of one denomination is fed into the blanking press of another denomination; the diameter is correct, but the thickness is thicker or thinner than normal.

A fourth, rarer form is the double denomination. It occurs when a coin is struck on previously struck coin, such as 20 cents struck over a 10 cents coin. Since our Shah Alam Royal  Mint has struck coins for foreign governments in the past, it has been possible to find in circulation Malaysia coins struck on planchets intended for foreign coins, as well as Malaysia coins struck on previously struck foreign coins.

Malaysia.Wrong Metal, Planchet,
Stock Errors.Obverse.
(Dickson Niew Collection)

Another rare type of wrong metal error is called the transitional error. It occurs as the composition of a coin changes. Some Malaysia Parliament series of 1976 one cent coins are known to be struck on copper planchets of 1973 composition, while some 1973 coins were struck on clad planchets (1973 one cent coins were struck with planchets for both types of coins available side by side).

Some errors collectors claim that wrong metal and wrong planchet errors are striking errors, not planchet errors. Their argument is the planchet is OK,it was just fed into the wrong coining press.

One fact true for all errors of this broad category is that the planchets must be of an equal size or smaller than the intended planchet. A 20 cents planchet, for example, would not fit between the dies of the smaller 10 cents.