Combining knowledge of materials science with extensive numismatic experience, they strive to the fullest extent possible to return your coin to its original appearance.

结合材料科学的知识和大量钱币知识，他们尽最大努力以还原你的硬币到原本的外观。

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Anyone who has already bought the coin and wishes to return it, will be given a full refund of the 46 euro purchase price.

BBC: James Joyce: Bank regrets 'error' on coin

Broadly, instead of using simple supply and demand, it explains changes in the demand for one asset (a small silver coin, say) relative to another (a large coin) in terms of changes in the rate of return that the holder of the assets can expect from each.

ECONOMIST: The lessons of sound money from 1,000 years' experience