The World War Two homefront in the United States had already learned a lot from our friends in Britain regarding air raids and civil defense.
I think the pinetree insignia had something to do with automobile deoderizers.
Pictured here from the homefront of Grand Rapids, Michigan is the typical "Office of Civil Defense" steel helmet of WWII.
Although many US M1917 helmets were recycled for the Civil Defense role, these "OCD" helmets were unique and had, as evident here, a much deeper bowl than the "tin lid" of WWI.
This symmetrical helmet, stamped out of steel may have come from the same Detroit machinery that was stamping out automotive hubcaps prior to US entry into the war.
The interior shows a suspension system very similar to the US M1 helmet liner.
The property stamp on the underside of the brim.
Simple size adjustment provided a snug, custom-fit for the owner, in this case a woman from...
Grand Rapids Michigan.
The chinstrap (and suspension) is a cotton twill, secured to a spot-welded bail.
and return to those Auto plants to once again produce gas-guzzling cars . Until we got rescued, that is, by fuel-efficient Japanese technology.
United States Civil Defense OCD helmet, WWII
Acquired 2002, a gift