Hiya,
It's handpainted and hard;It can't be removed from the glass body of the flask.The pink colour also deepens as you look from bottom to top but it's not a big change of colour,as in peachblow.The whole body has a 'glassy' finish rather than matt and tilting it to the light shows concentric circles to the base.There is a tool mark on the bottom too.
I've trawled the internet,I've bought appropriate books (Amazon have made a small fortune out of me!) and visited even
more museums but still feel no further forward except perhaps to say that the Harrach mark is not a propeller...LOL! So,at least I know that now...if not a lot else
I've looked at Webb,Harrach and Stevens & Williams and I've searched through generic French & Bohemian enamelled glass images but I am left confused when many similar pieces have polished pontils or painted/printed marks and my one doesn't.
I've also been toying with the idea that this may be the lower section of a lamp but,again,it is just an hypothesis and can find no evidence to prove or disprove it.
Elaine