I'm trying to figure out what strings my '11 USA Jazz Dlx came with. The current Fenders with the color ball ends are great but sound a little different - the strings on my bass (bought new) had brass ball ends, no silk, and they sounded nickel-ish, a bit like Slinky's. Does that sound like the standard old-style Fender default string? What year Fender introduce the colour balls? I thought they were already on basses by '11, but I could be wrong..