Original Miners Helmet with Battery Operated Lamp 
Circa: 1950 the original leather constrution with metal battery powered lamp attached.
 
A Breif history: The electric battery was a big development in the miners equipment, now he had a battery that should stay lighting for the full eight hour shift, it was powered by a re-chargeable battery pack. The battery pack was worn on the belt and weighed about 2 kg. Each colliery had a 'lamp house' where the lamps and batteries were left at the end of each shift for maintenance, and for the battery to be recharged. Each miner had his own battery, some batteries were fresher than others and sometimes they did go out underground.