I can see the pictures now.
The British import mark "F" was used from 1867 to 1904. If this were that mark there would be other English sterling hallmarks and it would not be marked sterling. Your item is probably American made.
Could not match the mark exactly with any in my American books. However, I do have a possibility. G.H. French & Company made these types of items. Sometime around 1939 they became part of the Ellmore Silver Company. Problem is, they usually used the letters G H and F in their mark. Maybe, because of lack of space, they sometimes just used the "F" mark, not sure. Sorry I couldn't help more.
http://img145.imageshack.us/img145/9964 ... hcohy4.jpgPat.