Time TRAVELLER? A man with a cell phone in a 1943 photo

A 1943 photograph of a man “talking on a cell phone” went viral on social media.
Reporters discovered that the photo was taken in Reykjavik, Iceland, in 1943. The image is of an American soldier, but this person in the white coat is definitely not a soldier and is obviously different from the others in the photo. the person holds an object in the hand and brings it to the ear like a cell phone user. And he has his mouth open, that is, apparently photographed at the time of the conversation.
And next to him there is no one with whom he can talk, no one looks in his direction.
Social media users quickly concluded that the photo was of a time traveler he didn’t expect to be taken.
“He was alone, he was wearing a different headdress and a different scarf than the others, he was behaving like we do today and talking on his cell phone,” wrote Christian Hofmann, who first posted on the Icelandic Facebook group.
Skeptics, on the other hand, believe that the man in the photo may have looked at his watch while the photographer was working or decided to scratch his ear.
Still, the man’s hand should be holding something flat and rectangular. If it’s not a smartphone, what is it?