The extended white PG most definitely was a MIA Jazz Bass thing from the early 80's (maybe 1982-1984ish). It was the height of the CBS cost-cutting, and IMO it looks horrible.
The headstock logo looks correct for that time period too - that's what the later MIM and MIJ logos looked like. However, due to the damage to it, it's hard to say if that's REALLY a MIA Jazz.
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