Tank decoration/decals and shift says Harley, circa 34-35. The engine is probably a VL mill. They were the predecessor/generation prior to the Knuckle, the Big Inch Flatties, and the WL shown in the lower picture. if you eyeball the head design on each bike closely, you can see they do resemble each other but the outer primary covers are completely different physically. The other point is that the upper mill runs what looks to be an Edison-Splittsdorf type of magneto and you can see the spark plug leads leaving the cap, where the military 45 would likely have the Model 32E, 3 brush 6V gennie or something related to that version which did not directly provide spark but instead fed a battery/divorced coil/ timer system. Whatever the Knuck and the UL's ran for a gennie, pretty much so did the WL.
GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.