Greetings silver experts. I was curious if anyone out there who is knowledgeable about Gorham silver marks can help me with a bit of a mystery. I recently acquired a couple of silver pieces from an important estate which included a Clemens Friedell Pasadena Sterling tureen that I believe to be part of the important dinner service made for Eddie Maier along with a beautiful three handle Art Nouveau Gorham cup. The Gorham cup has the standard Gorham company mark on the bottom, the horseshoe mark for 1905, and a mysterious letter 'F' with a diamond above it. I know Friedell was employed by Gorham in 1905, and I was curious, particularly because the Friedell tureen was in the same collection, if possibly the 'F' could be a sort of signature for Friedell. I would greatly appreciate your thoughts on this.