many thanks neil - so guess we may never know who actually made the bowl - although in view of your comment about 'importer', then it seems very probable that the bowl may well have been sourced from the Continent - and this may also account for the 'dot'. Although Registration Nos. are not usually seen on Continental pressed glass, it would, as Bernard pointed out, be.............
'perfectly natural for a continental European mouldmaker to separate off his thousands that way' ......believing perhaps that was what he was supposed to do.