Three Viking warriors in a reenactment from the Jorvik Viking Festival (2012).

Reenactors and creators of the helmets, armour, clothing etc, are unknown: kudos to them for their marvelous work.

The helmet of the warrior on the right is modeled after Valsgarde 6 Helmet (Vendel Culture, Sweden, 6th -8th centuries AD). The helmets of the warriors on the center and on the left are rather 6th century AD Spangenhelms. Actually all of them belong to an era predating the Classic Viking Age (793 to 1066) but I believe that a number of Early Viking warlords (9th century AD) used these types of helmets (many as family heirlooms etc).