Japanese Air Defense badge ?

[Squale69]

Hello,
May I have more information on this badge ?
Japanese one ? What era ?
Thanks.
P.A

[ghp95134]

Japanese, pre-1945, overpainted post-1945. Any writing on the reverse side?

Some sort of Air Defense badge.
防
Bō
ward off, defend, protect

Nick/JapanX has 11 pages of these badges here. I didn't see it, but I just quickly glanced through the thumbnail images.

-- Guy

[Squale69]

Thanks Guy !

Actually the pic shown above was an example...
The badge I have is set on the front of a civilian helmet. Almost the same, No writing on the reverse side.
As you mentioned it does not appear on the 11 pages of the listing...