OLP 4 String Bass, Licensed by Ernie Ball
4 string OLP bass. "OLP" stands for "Officially Licensed Product", which is a weird name for a bass, but it indicated that Ernie Ball licensed the manufacturer to make this bass in their image.
Clean neck, no discernable fret wear, body and finish are very clean. Pickguard shows signs of wear, and the bridge has some light funk that looks like it will clean up.
The pickup is a humbucker that splits into two volume controls and one master tone.
Production is probably early 2000s.