Hinomaru

[Pathfinder]

I was wondering when the Hinomaru ('meat balls') were changed from:

a) the single red circle
b) the red circle with a thin white band
c) the red circle on a white rectangular background

Any info on why the change took place and when would be appreciated.

Also, were the symbols always the same on the fuselage and wings? For example:did a single red Hinomaru on both sides of the fuselage mean the aircraft would have the same on the wings?

Cheers,
Pathfinder