Postby agphile » Sat Feb 25, 2012 2:34 pm
I don’t know of a single book that will answer all the implied questions. Regulations about the fineness and marking of silver have varied from country to country and over time. In England, for example, the sterling standard originally aligned the fineness of manufactured silver with that of the coinage to guarantee the value of a given weight of silver. The household silver was one way of storing wealth in the days before a developed banking system. Then, when circumstances changed, the higher Britannia standard was made a requirement when a shortage of coins created the need to discourage silversmiths from melting them down.
The term “coin silver” is one I generally only see used for American silver to cover two distinct categories:
a) From the mid 19th century on, silver that is marked “COIN”, where the maker is certifying that it is of the same fineness as the American coinage, i.e. 900 standard.
b) Earlier American silver, before any regulation, that does not carry a fineness mark. Here the fineness will depend on the source of the silver used and whether it was further alloyed. The fineness may be higher (or lower) than the “COIN” 900 standard.