Real or fake Imperial Japanese Army flight school badge?

[War Relics]

I posted this in the real or fake thread with no response. Now I’m posting it here and hoping someone will weigh in on it. The pictures are for a listing of an Imperial Japanese Army flight school badge. The sellers description is rather vague. My question is this badge an original or a copy? My thought is that it’s a copy since I have seen photos of others that have engraving or inscriptions on the back. I don’t know very much about them which is the reason for my post. Any and all responses are appreciated.

[SARGE]

I am not fond of this badge to be frank.  The quality of the casting is not very good and lacks detail.  The back is hardly finished at all.  

 

 

[War Relics]

The photos that have seen indicate that they were inscribed on the back in some way in Japanese which made me wonder about this one. Those have a much higher selling price than this one!!

[Tonomachi]

I found a website (see link below) concerning the evolution of Japanese Army & Navy aviation badges from 1913 through 1945.  There is a small selection of fake Army Pilot badges.  None of the original pilot badges have a pin back assembly like the one pictured in Post 1 and the quality is very poor so it is probably a fake piece. 

 

 https://www.warrelics.eu/forum/japanese-militaria/evolution-japanese-army-navy-aviation-badges-1913-1945-a-667498/

 

 

[vintageproductions]

The main concern should be the U.S. style pin back and catch as WWII Japanese badges do not have that.