I have a beautifully preserved and originally sealed 1960 extrait as well. When I first wore it, I was quite surprised how subtle, soft and eventually musky (soft) it is. I think it is so intimate and soft, like a "whispered kiss". It is very special and I dearly treasure it. Fortunately, it is 2 oz. and very little evaporation had occurred.
When it comes to the (more) modern L'Heure Bleue... I think the extrait is a rather easy-going wear. I tend to think it lacks something special a bit (nothing pronounced or in focus). I'm a bit inconclusive about it. It sure is a fantastic fragrance.
I do prefer the vintage EdP (gold-black box), which is spicy, a good dose powdery and producing more sillage. It is superb when its remainders on fabric beguile you during the day. It is a day-long affair.
My very first sniff of L'Heure Bleue was the current EdT and I fell for it. I plan to sample the current EdT and EdP now again with my acquired experience wearing it.
A vintage EdC is on my list already, which is mikeperez fault