There are not that many options from the current Fender Catalog for five strings. You have 7250s (Super Bass nickel on steel), 8250s (Super Bass Taper for thru body), and 7150s (Original pure nickel). I have a set of 7250MLs that have black silks. If the strings are thru body with a taper on the E and B, I would bet 8250s.