yes, you could be correct, possibly. I had in fact already typed the following, so will let it stand.
hope I don't get into copyright trouble for quoting, but here goes................the caption to the illustation says........"Two pages of designs for pressed glass by Edward Moore published in the Pottery Gazette 1st December 1888."
So presumably registered either on, or prior to that date. The illustration shows a variety of similar pillar designed shapes, for smallish to medium posy troughs, boxes, tricorn containers, plus two different sized swans.
Can add that............."Pressed glass by the Moore factory does not carry a trade mark, and there is some confusion about whether the Webb registration diamonds appear on the later Moore pressings".
This factory was, apparently, destroyed completey by fire on 4th July 1891, although did restart the following May. After the final closure of the Moore factory in 1913, it would seem that all the moulds were again transferred, this time to the Davidson factory.
Hope this of interest.