PART V. Planchet Errors:
Bi-metallic Errors:
Wrong Core inserted
Definition: Bi-metallic error coins are restricted to foreign countries. These coins may experience any of the many types of striking errors listed in the Error-Variety Ready Reference however, one must understand we are dealing with two components, a ring & a core. Any number of exotic possibilities or combinations of die varieties, die errors, planchet errors & striking errors can be found on bi-metallic coinage.
An incorrect core is wrongly inserted into the ring center hole. Occurrences are extremely rare.
A 2006 two pound technology from Great Britain having a steel core inserted before strike. (Core is strongly attracted to a magnet).
The weight of this error coin is 9.23 g, well below the 12.0 g for a normal bi-metallic of this series.
A normal two pound core consists of the following composition and weight:
Two pound core 75% Copper, 25% Nickel Core – 6.0 g
A 2005 Chilean 100 Pesos having an aluminum core inserted before strike.
The weight of this error coin is 3.94 g, well below the 7.58 g for a normal bi-metallic of this series.
A normal 100 pesos core consists of the following composition and weight: 100 Pesos Core 70% Copper, 15% Nickel, 15% Zinc Core – 4.20g
