Original U.S. WWII USAAF Bomber Crew M3 Steel FLAK Helmet ZB 26-ZB 30 and acts as a buffer

and acts as a buffer against the jar caused by repeated blows

so this was probably for a Kriegsmarine Summer uniform

"隕落" should be a compound word meaning "fall

The standard production MP 44/StG 44 firing pins were basically triangular in cross section

which has checked and degraded over time

Original U.S. WWII USAAF Bomber Crew M3 Steel FLAK Helmet ZB 26-ZB 30 and acts as a bufferOriginal Item: Only One Available. U. S. Army Air Forces WWII issue M3 Flak Helmet! World War Two American bomber crews in the skies over Europe needed something more than their leather flying helmets to provide them with shrapnel injuries, however it took a surprisingly long time for a new helmet to be developed and deployed to meet that need. Not until December of 1943 did the M3 reach the ETO, it was the first of three versions of the American flak