. . . from 2012:
Yes, a rare example of the original iteration of ref 2179, marked without a slash. I've never seen a caseback marked 2179/1, only 2179/2 thru 2179/6. There were reputedly ten thousand 2179/2 and /3 produced under contract for the US Army, plus countless thousands more /4, /5, and /6 for private agents after the war. Ref 2179-no slash are extremely rare, I've seen only one other.
(This one has a refinished dial but is otherwise correct.)
Thanks for sharing, Nicolas!
Art