Not sure if there is a way to get these images working again. But I did remember seeing this post.
Just a note to say Langdon has a P.F in his book (page 74), which actually looks more like a PE to me. He says it's probably Montreal maker (although I have noted a few of his unascribed have ended up not being Canadian!).
Another teaspoon is online that is described as PE and it seems to match Langdon's mark.