What's with the crazy rear spine that appears to be soldered to the cruciform?
Hi chas: The rear spine on the 115th helmet mounts a little differently than on a standard spike helmet. The rear arm of the spike base is formed to the contour of the rear spine and holds the upper end of the spine in place when the helmet is assembled with the spike base on top of the spine. The upper end of the spine is also generally cut in a "V" to clear the rear base stud. From the photo it looks like the helmet has been assembled incorrectly with the rear spine on top of the base.
Reservist1