That pesky T20Ver2 is for the most part in the way of the full model >.< .
Have any whiteout? Or finger nail polish? You may be able to rub something into the lettering. Or you may be able to carefully scrape off the T20Ver2.
Ok I took some pictures of the chip. Sorry if they aren't good enough, they are the best I could get.
The pictures are good enough. The T20Ver2 definitely obscures the interesting bit.
I suspect that may not be an AVR processor. I have dozens of AVR processors. They are all imprinted with the Atmel logo...
. None of them have the word "Atmel" in a typical typeface like the chip in your picture.