Vintage Strings for a Vintage Gibson?

[architectonic]

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?

[BadB]

Flats of some sort.

[flatwoundfender]

probably flats, that would be left on till they broke.

[brachal]

watch out with rotosounds on old basses -- especially if it's a loaner. I had swing bass strings on my 68 eb3, and they've left noticeable grooves on the frets. I think the metal used for frets was softer back then.