Japanese Naval helmet pick up?

[1918Militaria]

I just got this in the mail from a old time style surplus store that trades in Militaria.

As I am new to Japanese, I wanted to ask about the paint. It is brushed on paint inside and out. Any flags so far?

Where the metal shows through there is a nice patina, in some areas on the inside, (it will be impossible to see via photos) what seems to me to be a under coat of green comes through in some places but I stress I cannot tell for sure weather it's green or patina on the bare metal?

(Edit: I just looked with a magnifying glass, it's bare metal and not green paint, but very dark patina)

The paint on the front pin might be a little off from the rest of the helmet. Not sure with this either.

I just want to know if I got a decent helmet here or if it's been messed with? Can anyone comment? Photos to follow....

[1918Militaria]

Welp! Sent it back on the advice of a guy who collects Japanese stuff on another forum.

Michael