1st crack at this 1910s body armor meant to stop machine gun fire. It would seem that the few pictures and videos available online feature at least 3 different variants, and I have no idea what the internal spring mechanisms looked like. This will be an ongoing research project.
![](http://68.media.tumblr.com/tumblr_ktx3q8phTI1qzs3iqo1_500.jpg)