It looks very familiar and I think we may have made a few at Sowerbys in my time but not enough to remember the pattern number. However, 2617 sounds very likely. Sowerbys did a lot of acid frosting pre WW2, when this would have been introduced but none post-war, at least when I was there (sandblasting was a crude substitute for a few patterns). So any examples of this thing which I might have seen would not have been frosted.
There was a huge department where acid work would have been done, still called "the painters" but only used for furnace brick storage and general junk when I was there.
Adam D.