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The LIEUTENANT was actually released PRIOR TO the WWII war declaration by the US, following the bombing of Pearl Harbor, on Dec. 7th, 1941... This model first appeared in the BB crystal catalog, in 1942... However I also have the illustration from a May of 1941 vintage ad. (Crops illustrated below...) It is most likely a 10 kt. RGF (Rose Gold Filled) case, and has 15 Jewels...
Interestingly, the namesake was apparently either changed in 1942/3 to the "RANGER?" Or more likely an additional model(s) were added to the roster??? Both sported 15J movements and the Ranger also came in the YGF case option... (THANKS :-) Jerin!)
Best :-) William