SilverCollecting.com is the online encyclopedia of American Silver Marks.
At this website you will find a collection of hallmarks from American Manufacturers and retailers of sterling silver, coin silver, and silver plate. In order to start you can browse the index where all the marks are listed alphabetically by manufacturer. Click on any letter and start searching between 201 marks. Apart from the index, you will also find other categories to learn more about this practice. These categories are: Bibliography, What’s New at SilverCollecting.com, Unknown Silver Marks, Frequently Asked Questions, and View their eBay Auctions. They add new marks on a fairly regular basis so you can check back often and you will always find something new. You can submit a silver mark to this website by sending it to them to an email address available at the FAQ section. They ask the prospective contributors to send a very clear picture of the mark with any additional information that they might have on the American silver maker. 
