While searching for some reference material on chop marks (the symbols that papermaker’s would emboss into the papers to identify themselves) I stumbled onto this incredible group of Renaissance marks:
I’m printing some of my some of my images in platinum/palladium and cyanotype onto heavy, handmade, watercolour paper and I want a chop mark. These old Italian marks give me a point of departure in the design of my own. Truly amazing that these even exist and that I was able to access them so quickly. Sometimes I let the internet be my friend.