Ibanez instruments from the 1960s are a lot more fun to look at than they are to play. A lot of them are quirky and cool, but they're not very high-quality.
It wasn't until the 1970s that Ibanez and other Japanese brands began to build good quality instruments. They made up for lost time quickly; making excellent stuff by the mid '70s, but Ibby basses from as early as the Rhythm Maker model are more like stage props than instruments.
"People don't realize it, but the bass player holds the whole thing up like Atlas." -Some wino who talked to me on the subway on my way to a gig