I cycled past this stone today on the Dutch island of Texel. I discovered that it was a memorial in memory of a group of US Air Force men who were killed when their B-17 bomber crashed on April 1945. A plaque beside the stone records the names of the eight crew members who were killed. Two others survived.
The stone is located beside a cycle path (6) at Watermolenweg, Den Hoorn, en route to the ferry port for Den Helder at ‘t Horntje.
Information via website tracesofwar.com F. Wibbeke.