
Welcome.
This vase is illustrated in Nigel Benson's booklet "Art Deco to Post Modernism", on p.13.
The caption beside it says it is no. 27829 in the 1964 catalogue.
I can't quite work out what else it says.

Bear with me. I'm trying to get sense out of potted notes which refer to individual references of this design appearing in various catalogues books and articles. (The caption refers to these individual incidences.)
It would seem it is a much earlier design, from the '30s, but only made spordaically, some in the '40s and some in the '50s.
It was well promoted but "very few examples are recorded, possibly because it would have been prohibitively expensive."
Finding another would give you another vase the same, but it would not be a true pair. A true "pair" would have mirror images engraved on them.
I don't know if those were even made.
But I suspect you have something rather scarce and wonderful.