It is an Original Maritime Explosion Proof Cast Aluminum Polished Nautical Industrial Antique Twin Tube Light – Big. It is an Electric lighting fixture for hazardous locations also listed as marine fixtures (Outside type saltwater) suitable for locations having deposits of readily combustible paint residues & suitable for wet location.
Caution: To reduce ignition of hazardous atmospheres disconnect this fixture from the supply circuit before opening. Keep tightly closed when in operation. To reduce the risk of Fire or Explosion, do not intall where the marked operating temperature exceeds the ignition temperature of hazardous atmosphere(S)