I suspect this is a counterfeit. The Bottom of box and bottom of the bottle appear to be different from pictures that I have seen of 100ml Edition Blanche.
The bottom of the bottle is missing the copyright symbol "R" above the Chanel on the right. Also, missing the "Allure." But, again, I have not seen another 50ml edt.
Can anyone confirm? If you would like more info., let me know.
Thanks!