The following is a real oddity, but Anne Wilkinson (author of Poole Twintone and Tableware) and I are trying to determine this very odd backstamp.
This query has also been posted on two other pottery forums, so apologies if you come across the duplicated topic.
The item was purchased in Canada - Poole did export there - but the impressed Poole mark is not known. So why the Royal Norfolk overstamp?
We have hypothosised over possible reasons: a trial piece; a forgery or fake; a test piece designed by Poole, but produced by Royal Norfolk; another 'Poole' pottery, based in, or around Poole, etc.
Could it be a small company, trying to emulate Twintone, and sell their wares illegally to Royal Norfolk? Has anyone ever seen similar markings?
The thing that intrigues me, is why impress it in the first place, and then stamp it? I can’t really see a known maker of pottery deliberately faking another maker’s piece of tableware, and then putting its own mark on it!
The final point is why bother? OK, so it is an unusual shape (but definitely not from Poole), so what would the perpertrators gain from this? Was it some form of scam?
Any views would be most welcome in trying to solve this mystery! With luck, if it can be solved, I will try to include the result in the book.