Thought I just saw you over at Ibanez Collectors World!
Anyway yes, this looks like an early one. No serial number makes it pre-1975 anyway, and judging by the catalogues Ibanez didn't carry this model for particularly long. The main detail that places it around '71/72 is the black button tuner set - these only seem to appear on very early 70s MIJ copies, and were rapidly replaced by the more common cast chrome type keys.
As I said, I don't think the 2350B model carried on much past 1973 anyway - the similar EB-0 & EB-3 models were upgraded like most Fujigen Gibson copies - early details like round-corner fingerboards & inlays and the very basic bar bridges were phased out, but you don't see "evolved" LP basses - they all have the same spec as yours, the tuners seem to be the only parts that got changed.
Jon.