I believe your Elgin to be authentic. I've seen that watch before and understand that Elgin produced it in honor of General "Black Jack" Pershing. Indeed, I believe your watch was even called the Elgin "Pershing" but I could be mistaken about the official name.
From what I understand, this watch was created to honor General Pershing for his success in his Mexican campaign as well as his WWI European campaigns. The last one I saw was also a 7 jewel 3/0 movement (although the dealer had it marked as 4/0 but this could have been a mistake on his part) and was cased in a steel case. The dial is undoubtedly original black porcelain.
It is a great watch. Wear it in health.
Regards,
Will
Posts: 80 | Location: Carlstadt, New Jersey U.S.A. | Registered: January 23, 2005