Please note that the island of Gotland is in the baltics which is far away from Roman borders.
http://scienceblogs.com/aardvarchaeolog ... _found.php
This is supposed to be an image of the mask.A citizen in the island province of Gotland has submitted a Roman cavalry-officer's helmet mask to the County Archaeologist. It is said to have been in the family for some time.
In Swedish news there was some more details.
The mask had been part of an inheritance, so it had passed down two generations before being handed over to the governement.
According to the person handing it in it had been found with a metal detector.
It will be part of a later exhibit at the Museum of Gotland who already have plenty of great stuff.