How to identify my graphics chip?

hi,

I've bought a second hand radeon 9700 on ebay. It works fine. However
I would like to know wether its build by ati or 3rd party companies.
On ati web site can seem to identify its chip. May be blind or
something.

Here are the markings on the back of this card.

back of card
S/Nsticker) G0306022251
REV 2 (sticker)

(sticker) E-G012-02-3323 (B) D33011

(sticker) grandmars xf97-c3 ati radeon 9700
128mb ddr dvi+tv out 275/270 mhz
3cptb035260131

(sticker) cn-0942219-a01cp-35g-025s

front of card (cant remove the cooler to look at the cpu as its glued
pernamently)

(not a sticker bu painted) PN 109-94200-01

(ati sticker on the fan) PN 7120004100
2Z4 JE

Plese help to identify this chip and ask more questions in neede.

thanks