The staff of the John Hay Library are not able to undertake research on behalf of researchers who are unable to appear at the Hay Library in person to conduct their research.Researchers unable to travel to the Hay Library are encouraged to engage someone in Rhode Island to assist them in their research; we will be happy to work with any hired research assistant to facilitate the necessary research.If you can find a copy of Tardy's International Hallmarks on Silver, you will have a better idea of what I'm talking about. US silver companies such as Gorham and Tiffany often used both marks in the late 1800's.Britain always used the standard 925 and had another standard which is 956 silver which was called Britannia silver (this Britannia silver is seldom seen) and instead of the Lion rampant or lion Pageant you would see Britaina. Hence why British silver is sought after pre-1900 hundreds.Below is a pictorial catalog of manufacturer trademarks.
The creation of this ellipsoid form seems linked to the emerging technology of its time.
Places like Egypt still today only use 830 silver I would just like to correct one point.
"Sterling silver" is a frequently misused term, especially on e Bay. Britannia ware is an alloy of tin, copper and antimony.
One also sees e Bay sellers advertising items marked "Alpacca" or "German Silver" as being sterling. Alpacca (also spelled Alpaca) and German silver are terms for an alloy of copper, nickel, and zinc. Again, it is a violation of Federal law to represent that such wares are silver. At that time the punch became the allegorical figure of Britannia.
This finer silver , which contains no silver whatsoever.