I need help identifying the characters on this artist’s seal (Characters identified: 南海)

Question

I have this cool tshirt from the 1990’s and really want to know who is the artist. I actually lived in Guangdong for 4 years and have asked some friends but they cannot help. So… translation software doesn’t help either. I would be grateful for anyone’s input.

Answer 1

It looks like “南凌” to me. But the instead of 凌 with two dots on the left it uses older version with 3 dots on the left 淩