So how does it compare with the plaque? Click on the details below to enlarge, and to move between them.
Is the c1830's plaque Moore & Co? It doesn't seem likely. The image appears so rarely we have to assume it didn't take off commercially. So there seems little reason for one pottery to want two transfer plates. Who made the plaque? Your guess is as good as mine.
Thinking about it, this is wrong! The image appeared exactly the way on the copper transfer plate as it would the object. It was first printed onto tissue paper, on which it appeared in reverse. Then the image on the tissue paper was transferred onto the object, the right way around again.
So why would we end up with a reverse image on pottery? Perhaps all the engraver had to work from was an imprint on paper direct from the copper plate.
I guess that means that it is just possible that bowl pre-dates the plaque.