This manufacturer from Japan is little known and we do not have any history of the Company at the present time.

Front and 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.
The rear view shows the traditional style of air inlet fitting and exhaust but a more elaborate telephone connector.

Close up view of the Choa Manufacturers plate on the front of the helmet

Photos Courtesy of Steve Whitehead

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