Malaysia Parliament House Series 5 Sen Coin (1967-1988) With Full Brockage Strike Error  


What is a Brockage Strike Error?
Many coin enthusiasts, find Brockage Strike Error coins to be among the coolest kinds of error coins.
A Brockage Strike Error coin about in a process that involves more than one event.

First, a coin must be, for one reason or another, not ejected or otherwise removed from a mechanical coining press. Accidentally, it remains on one of the dies.

Second, while a coin remains on one of the dies, the next planchet (prepared blank) is fed into the coining press and the striking process occurs again. This next planchet then becomes sandwiched between an already struck coin and one of the two dies.
Third, if the design devices on one side of the already struck coin become imparted onto one side of the next fed planchet (prepared blank) and if the other side of this planchet is struck by a die in a normal manner, then a brockage comes into existence. In a sense, a brockage has an obverse design on both sides (or a reverse design on both sides).
For simplicity, I refer to the typical situation where the hammer die, the one that is slammed downward, is the reverse (back) die and the stationary or minimally moved die (underneath each fed planchet) is the obverse (front) die.
The type of brockage that is most often seen is an reverse (back) brockage that comes about after a struck coin fails to leave the press and lies on top of the bottom die that is the obverse (head) die. When the next planchet (prepared blank) is fed into this press, it falls on top of the coin that was not ejected or otherwise removed, and then the ‘hammer’ die comes smashing down on top of this planchet (prepared blank), which is thus sandwiched between an already struck coin and an reverse die.
The reverse die imparts, in a normal manner, an reverse design to the reverse of this planchet that was fed into the press even though a struck coin had not left the press. The leftover coin, however, is ‘in between’ the obverse die and this planchet that was fed. Therefore, a obverse design is not imparted, as the obverse die is covered by the leftover coin. Instead, the reverse of the leftover coin is impressed into the underside (obverse) of the planchet.
Therefore, an incuse (sunken) and ‘backwards’ transformation of the reverse design is imparted into the underside (‘obverse’). The newly created error has a normal obverse and an incuse and backwards version of the reverse design as its ‘obverse’!


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