Is a 5S5 "goldring" worthless?

Hi I found this ring metal detecting on the beach. My eyes really wanted to read 585 on the Hallmark but it turns out to be 5S5. The only thing about 5S5 I could find on the internet was that it is used to scam people into thinking it is a 585 ring. Does this ring still has some worth despite having the 5S5 mark?

Looking forward to your answers :)