There's a huge amount of enamelling missing from your bottle as well as gilding on the body of the bottle as well. I think this detracts from trying to 'see' or imagine how it would look had it all been intact.
It seems to have u shaped drapes of enamelled decor around the body as well as very worn off gilding. There are little dots of white enamel that would have been decorative bands as well.
Harrach were very fond of their three feet and did do shell type gilded versions as well. It is the type of thing they would have made.
Is it possible to have a good picture of the neck towards the top (side on shape of the neck) and another of the rim of the bottle please, as well as one of the base?
The only observation I would make is that the gilded bands look very bright/hard and the neck and rim shape looks a bit not Bohemian somehow so I'm not really sure

Maybe it's more recent than I imagine or something ?
thanks
m