I have recently acquired a '68 (or '67) Gibson EB-0 as an extended loan through a friend. Totally different feel and sound from my Ibanez sr900, obviously, and really fun to play. The strings are deader than dead, and I want to try to replace them with something that would be close to what might have originally been on it. I was thinking RotoSound nickel Swing Bass. Any ideas what brand/type of strings would have been used back then, or what was issued on the old Gibsons?