The H.CX Hallmark Encyclopedia and 925-1000.com are two websites featuring silver markings from around the world. Both websites let visitors search pictures of silver markings, and they both feature forums where collectors help each other identify difficult markings.
The H.CX Hallmark Encyclopedia searches by keywords and locale. The home page displays recent additions of hallmarks, some with information and some as of yet identified.
925-1000.com is a more complete illustrated encyclopedia with organized search categories such as American marks, world marks, silverplate marks and flatware patterns. Both antique and modernist silver markings are represented. In addition to the illustrations, 925-1000.com includes resources for buying and selling silver, such as the current market prices of precious metals and weight and currency conversion tools.