The marks A1 R P N S S on British sterling silver I know. A1 is supposed to be of high quality, but I can't find a lion stamp or anything like that. Any ideas as to if it is actually sterling? And if so, why does it not have the lion?


A1 is usually a mark found on silverplate. I doubt that what you have is sterling. It is most likely American made, but I have never seen or heard of those other initials, nor can I find them on the website I use for checking. So sorry, but that one will remain a mystery.

Updated on May 8, 2018

Original Article:

British Sterling Silver Hallmarks
By Diane Cass