I have a WW2 (presumed as it has a "Ruptured Duck") U.S. Navy, dress blues (worsted wool, not fuzzy), with a "Special Service" badge, fully embroidered, it also caries the “Ruptured Duck”, and a grade of Petty Officer Third Class /corpsman. Can anyone tell me about the U.S. Navy's involvement in the British Special Forces? Best regards, Fernon