What is tattooed on Popeye's arm?

Popeye the Sailor Man is a fictional cartoon character created by Elzie Crisler Segar. The character first appeared in the daily King Features comic strip Thimble Theatre on January 17, 1929, and Popeye became the strip's title in later years. The character has also appeared in theatrical and television animated cartoons. Popeye has an anchor tattoo on his arm.

Source: Wikipedia