‘North Sea’ historical pictures (exact matches)

Viking longship
Viking longship
North Sea Whale Fishery
North Sea Whale Fishery
The War in Denmark, the Austro-Prussian Squadron at Cuxhaven after its Defeat off Heligoland
The War in Denmark, the Austro-Prussian Squadron at Cuxhaven after its Defeat off Heligoland
Collision of Mail Steam-Boats between Dover and Ostend
Collision of Mail Steam-Boats between Dover and Ostend
Fairey Swordfish sinking a U-boat in the North Sea
Fairey Swordfish sinking a U-boat in the North Sea
Gray weather day at the North Sea with surf
Gray weather day at the North Sea with surf
The Cod War
The Cod War
Walton-on-the-Naze
Walton-on-the-Naze