Original Rare Imperial German WWI Aviator’s Roold Pattern Crash Flight Helmet Technical Books however there are no blocks

however there are no blocks of serial numbers we can find that would indicate which unit it was sent to

The Army’s Kokura Arsenal tested the Czech ZB vz

and measures approximately 14 3/4" x 4 1/8"

The reason being

Samuel Colt experimented with double-action revolver systems

Original Rare Imperial German WWI Aviator’s Roold Pattern Crash Flight Helmet Technical Books however there are no blocksOriginal Item: Only One Available. This is a fine example of a WWI Imperial German Roold Pattern Aviators Crash Helmet, the first we have ever had the pleasure of offering!. Typically used by Imperial German bomber crews, this Roold style helmet is made of pressed vulcanized material with compressed felt filled bumper pads across the crown and around the brim which are made of an oilcloth material. The Helmet is fitted with a short, stiff black