Hello thank you both - Nev and Anne,
Sadly, there is no maker lozenge (no mark at all). For that period Nev does that suggest to you that it's not likely to be by an English maker? if it was to be English, the only thing it reminds me of a tiny tiny bit is the Henry Greener cow. something in the detail. But I can't see where you can handily find Greener designs? I don't think it is Von Streit, but it does remind me a bit with the flared rim so I'm wondering if German is more likely.
And Anne many thanks I will have a trawl through these (I have seen them before but forget about them a bit as my usual go to for catalogues first is glas-musterbuch, also, I am usually looking for hens not ducks!).
ps .....Also, it doesn't glow which is a shame...