this is partly because I was practising with the camera, and not doing too well, and partly because I sent them an email about a week back, but no reply so far.......... perhaps it's the possibility of BREXIT that has made them go quiet

Apparently crème de la crème in the world of perfumiers, they have a history going back a very long way, and wondered if this bottle might have been late C19 or, as is more likely, C20.
The stopper is pressed, then ground/polished to give flat sides, and it fits the bottle well. The relief decoration looks to represent an image of the Legion De Honour, but not too sure, and there are base marks which read.... 2770 DY. 5.75" (C. 146 mm) tall.
The slightly crude quality of the container appears a little at odds with an otherwise haute couture name.
Tried for ages to improve the picture, but this is about as good as it gets I'm afraid.
As I say, just wondered if this might have been eighteen something or nineteen something.