This does not look "etched" at al, I'm pretty sure it's cameo.
Cameo bits are all limited edn's, I think, but I only know of Helen MacDonald's Ivy pattern.
Caithness did produce a load of superior and limited edition things - I've seen a Grall charger, also by Helen.
However, there is not any comprehensive list of what was made, by whom or when, not that I know of.
I just occassionally encounter a bit of it.
I've not seen anything like this before, not with all those colours in it.