This manufacturer from Japan is little known and we do not have any history of the Company at the present time.
rear view of the 12 bolt helmet. The bonnet top or crown appears to have
been soldered on or possibly this is a reinforced crown.
Close up view of the Choa Manufacturers plate on the front of the helmet
Photos Courtesy of Steve Whitehead
If you can provide any more information on the CHOA Company please contact us at firstname.lastname@example.org