John was never very particular about what bass he played. Basically: black or white, bolt-on, four-string, Fender style, and if it says Ibanez on the headstock so what.
I once spoke to John backstage after an Asia gig why he had returned to playing his ebony Victory after the Asia reunion and he said he'd dig it out if he felt like playing a black bass - and if he felt more like playing a white one, he'd choose the Zon (
"The Gibson is harder to play nowadays, none of us were meant to still play rock'n'roll at our age."). Plus: "I'm a Yin & Yang guy."
A man who played for ... yes, fins ...
Himmel, I do have to come to terms with that ...
PS: Greg had a nice voice and did an admirable job stepping in at short notice (while John as AWOL, when he should have been AA), but he has a lower range - that caused issues with lots of Asia material.