The Prins Willem (Willie), is a very popular wreck in lake Michigan.  This is the second time the vessel sank.  The Willie was originally started in 1939 in the Netherlands and she was almost completed when World War II started.  What was completed of the Willie was purposely sunk on May 10th, 1940 in the river at Rotterdam to block the waterways use by the invading Germans.  In 1945, after the war ended, the Willie was refloated, cleaned and completed.  She finally enter service in January 1949 for the owners, Oranje Line.

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