not a great deal Chriss, unfortunately - always very difficult to be positive with these things, so many variations and styles, and made in so many countries.
My opinions are............. could be British or eastern European. Radial cuts on the base, over a depression, is an uncommon type of finish on quality pieces - most bottle are made flat on the base prior to cutting the star, the arms of which then meet in the centre - or the base is left flat without a star and with just the depression showing. The base on this one still shows signs of irregularity (inside the depression) where the pontil connection was snapped away from the base, not something found on better quality decanters.
At a guess I'd have thought somewhere around the first third of the C20, perhaps a bit later.
A blown stopper is quicker and easier that one that needs cutting etc., and the cutting on this body is shallow and not complex.
Always possible there might be matching Nos. on the stopper and rim/neck, but I'd have thought unlikely - if they are present, then the type of script might indicate whether a Continental or British origin.
Sorry this is of no real use - but as I say these things abound in their millions and the less quality they have the harder they are to find provenance for - but look good when full of a good tawny sherry.
