I got this pen today at an estate sale and am trying to identify it and figure out how much it is worth. At the sale there was a lot of World War II items. I'm thinking it might be an officers pen from World War II, I am not sure. On the pen it says " 1/20 10kt Cross Made In USA" There is one diamond between two red rubys on the gold plate attached to the pen and there is also some type of bird above them.