How do i find the brand on after market rims? It has a fancy "S" on the cap...?

my friend just bought a car with after market rims but i can't find any markings that can help us find what brand besides a really fancy "S" on the cap. Inside the cap it says "A54 >PPO< A110" but i don't know what any of that means. They are 4 lugs and silver and they have locking lugnuts. Anyone help???