Might be a long shot this one, I have been through the pictorial American marks, but not confident enough to find who may have made this spoon. Showing the marks present, the handle and spoon bowl, in case that helps with the identification.
Please pardon me, but I just joined here and have a couple of hundred Sterling items I am trying to document. I cannot figure out how to create my own new post. I too have a spoon I cannot identify. Thanks.