Is this an image from the photo series taken when some of the large wooden shipping crates were being opened in front of the ?U.S. Treasury Building? I saw it the other day, posted on another forum.
It shows that helmets were shipped with spikes disassembled (on M15 models), and reveals this exact situation that enabled the wrong assembly of Jzp spikes, Kurassier spikes, mixed up with Infantry spikes on so many of these War Bonds helmets.
It's a great image. Thanks for posting it here!