The frigate "De Vrijheit" of Altona catching whales. The initials on the flag ("R I") stand for Roluf Jansen, the captain. Jansen was from the island of Föhr. Some of the 20 tiles have been restored, and the date at the top has erroneously been changed from 1725 to 1625. Tiles of this sort were popular on the low-lying Frisian Islands because of their resistance to the effects of flooding.