it makes no sense to release AT900 now because it's not on Yonex catalog (roadmap) for year 2004. It's probably not from Yonex, or you can call it: fake.
Probably Ashaway rackets. I am always confused by the Aerotec[if it exists and i am not looking at fakes] and the Yonex Armortec, they looked kinda similar. =)
have you ever seen it? as we know, Armortec 900 does not exists. at least not in retail today. i think there are a few possibilities: it is fake someone is pulling your leg you misread 800 to be 900.
Could be another brand of racket other than Yonex, just copying the designs of the other Armortec series and releasing it as their 900 in the series.
From the last pic, since the shaft and cone are 1 piece??? Does that mean fake??? And seems it "copied" AT700's color scheme.