Danish navy MK2 talker helmet (1945-?)

This is an American talker MK2 talker helmet sold to the Danish after World War 2. The way to tell the difference is that the Americans typically painted the helmets a navy blue while the Danish ones are olive green. The helmet could be from any time after the war really but is most likely from the 1950s. The reason the helmet is such a massive size is to allow the use of a headset for sailors on the deck of a ship to transmit orders via sound-powered telephone. The helmet is also made to be usable while wearing a gas mask or using binoculars.

Noteworthy details: Almost perfect condition, no markings, one of two of the largest helmets in my collection.

If you have more information on this or want any more details please contact me at michaelshelmets@gmail.com