The license plate dates from 1957. That was also the first year if the AZL version of the 2CV, with the aluminium strip on the bonnet. So pretty sure it was built in that year. In the above mentioned magazine is the same picture as shown here, plus another picture of the car seen fron the right side, and behind it a normal 2CV (though with these special rims, some striping and a lighter bumper. On that picture one can see how much the profile of the car has changed. Also interesting: the doors on the left side have got handles, the doors on the right side don't; these are only to be opened from the inside.