Looks like there's a "2" before the "5". Perhaps the serial is 25101. Does it have "Ernie Ball" on the headstock? If so it's an early 1987 Ernie Ball...
I set my five Sting Rays with a straight neck, a string height just a tad under 3/32" at the 12 fret and Super Slinkys. Most times use a pick. Never...