Definitely KatrinaSlack, I agree one of my concerns was the shape of the pockets too!!
Thanks heaps Lescoy. I now realise it is a copy. I have compared the python to my patent betty and although different models there are a few giveaways which you have all helped me to detect:
1. the brass bit that connects the actual ring to the silver zipper pull is not the right shape (thanks mere girl)
2. the stem of the brass ring is flat and doesn't narrow in as the patent betty does
3. there is no ykk on the zipper
4. the made in italy under the chloe on the main zipper pull
5. the external pockets are not as square on all other authentic betty photos I have seen.
I have added a separate photo bucket link here with a couple of comparisons:
http://s936.photobucket.com/albums/ad208/KatrinaSlack/python issues/
Thanks again all - Lescoy, saz123, brigette, meregirl....invaluable help.