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Posted 04/12/2014 5:54 pm
Here's a pic of the 1770 coin edge (compared to a 1737 assumed authentic). Clearly a fake unfortunately.
As can been seen, also the coin dimater is larger than expected (39.5mm vs 38mm nominal).
While some variation could be expected in coin dimensions, a relationship between diameter and thickness HAS to be maintained, as this dictates volume, and volume evidently translates into silver contents.
In this case, I suspect dimensions were increased to add some extra volume (and thus weight) to the coin and this way compensate for a lower density alloy used.
As can been seen, also the coin dimater is larger than expected (39.5mm vs 38mm nominal).
While some variation could be expected in coin dimensions, a relationship between diameter and thickness HAS to be maintained, as this dictates volume, and volume evidently translates into silver contents.
In this case, I suspect dimensions were increased to add some extra volume (and thus weight) to the coin and this way compensate for a lower density alloy used.
