Fiji Cancel Puzzler Help, Please?

At first glance, I thought I had a stamp canceled at Ba, Fiji, a definite location.Then, I noticed, to the left, an "O" and a fragment of a letter to the left of that. But I haven't been able to ID a four-letter place ending in "-oba" in Fiji (the balance of the layout indicates to me a four-letter place atop that cancel).
Can any Fiji expert out there help me ID the place?
BTW, I considered a two-letter place (at left) in the district of Ba (at right), but haven't been able to find anything like that, either.
Thanks in advance.

I think the place is Ba,and not .oba (the O is too far from the B)
Maybe PO (Post Office) Ba?

Possibly GPO BA
Ba being the town.

(not mine)

PO BA it is, nice one vayolene.

Nice cover for a Newfoundland collector.

Thank you all! I would agree with your "P.O. BA" assessment.
On the cover to Newfoundland I believe I see a period following the O on the rightmost cancel and it looks like it MIGHT be a P before the O.
How great that someone could come up with a cover with the germane cancel!

Lovely cover.

Nice to see the use of the gregarious word NOOK, marvelous,
yet we hardly ever see the use of her shy sibling CRANNY, whom only appears when holding hands ....Nook and Cranny.