I did some research and found that one of the marks, the one with 3 x's, was used in amsterdam from the 16th-17th centuries. That's about as far as I was able to get, I appreciate any help I can get. http://i169.photobucket.com/albums/u234/Sln4tra/Sln4tra003/IMG_0041.jpg http://i169.photobucket.com/...