Assuming it is Stuart, the company name is absent from the back stamp, as is partly to be expected from a piece first registered on 16th January 1917 (if it was actually made around that date). The first five digits which read 65916 are fairly clear, and the Blue Book gives the sixth digit as a 4 - thus providing confirmation that this is probably from Stuart. Of course, it isn't possible to say when the bowl was made, but do people think that a heavy/largish script such as this might indicate a fairly early date of manufacture?
Not the more attractive 'apple green' used on the Stratford design, or the brighter green used on the much earlier art nouveau pieces - more of a bottle green I guess - does anyone know if this colour had a name? or even if the bowl shape has a name perhaps - I've not seen Stuart in this livery previously. Has a really long ding when flicked, and diameter is about 10.25"/260mm,
I've looked in Hajdamach/Miller's/Brit. Glass Between the Wars/Jackson, but haven't been aware of seeing this shape. Thanks for looking