1. 
   sterling standard
   The proportion of pure silver to base metal set for British sterling silver. From 1300, apart from the period 1697-1720, when the britannia standard was enforced, the legal standard has been 92.5 per cent pure silver, the remainder being one or more base metals such as copper, to lend strength and w...
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   sterling-standard
   The proportion of pure silver to base metal set for British sterling silver. From 1300, apart from the period 1697-1720, when the britannia standard was enforced, the legal standard has been 92.5 per cent pure silver, the remainder being one or more base metals such as copper, to lend strength and w...
   Found op http://www.antique-marks.com/antique-terms-s.html
   
   

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