This is a second effort to post this query, I apologise if the first actually made it on to the Board.
Hello, I am fairly confident that the glass boffins out there will be able to give me an ID on this moulded glass lamp base. It is an attractive and large piece which stands around 22cm tall to the top of the glass neck. It has 4 visible mould lines and is not marked. It is fitted with an old bakelite double bayonette fitting. This means that when fired up, the lamp is lit from within by a small bulb and also a bulb on the top as normal. I have owned a couple of these bases but this is the first with the fittings in place. I believe that it may be French or Belgian, but would appreciate some info on the maker and also the country and date range of manufacture. Many thanks