Thank you, Anne - an inspired piece of lateral thinking. Query resolved!
Apologies to Paul - you were quite correct about about the Davidson attribution.
I must say it had niggled at me, too, that there seemed something familar and '1930-ish' about it, but I just couldn't place it at the time. I had even tried substitution of single digits in case of a misreading but nothing seemed to click.
Now that I've checked up, though, I do actually have a reference photo for RD 831491, but it is for a whole 7-piece fruit set as opposed to a single dish. I really do need to acquaint myself with the Art Deco pieces more often.
Anne, could you remove RD 331481 from the GMB RD look-up list, please? - thereby saving poor Paul a fruitless search at TNA.
Would it be it appropriate to change/correct the topic header, too, to avoid future confusion?