My first reaction on seeing your pitcher was that it is obviously American. A look through H&G book 9, Cranberry Opalescent, shows that H&G had the same difficulties as yourself. On p68, the caption of the central pitcher finishes which could have been made by either Hobbs, Phoenix, La Belle, Northwood or even in England.
What is easy to forget is that experienced exporters to the USA like S&W, Webb, and Walsh would have made their export tableware to shapes familiar to the USA public. So, experience with these companies' production for the British market may not be particularly useful in solving your attribution problem.
I did notice that the Northwood handle in colour plate 1 is identical to yours, but that is not enough for a positive attribution.
Your pitcher looks a creamy yellow to me, but my monitor is not very accurate on colours. Yellow over opaque white is typical of Walsh Primrose
, and an all-over matt finish is typical of their Sateen
glass. However Walsh glass is recorded in their factory pattern books, reproduced in Reynolds, and I cannot find any hint of American shapes in their tableware. So probably not Walsh.
I can't help further.