Vintage Perfume bottle Cobalt blue crystal with silver top? 7 cms tall x 3 cms

Cobalt blue (bristol blue) perfume bottle – .    In used vintage condtion. A few very small nics from use. The glass stopper is stuck in the bottle.   I havent tried to get it out as I dont want to damage it. (can probably be steamed?)  The silver top (untested) has a couple of small dents otherwise a really lovely little bottle.   There are no hallmarks on the top that I can see, but it looks like silver.  The size is 7 cms tall x 3 cms x 2cms.

Dont hesitate to ask any questions.