The jug you reference as being in Hajdamach is in British Glass 1800-1914 page 172. It isn't the same jug as yours, the engraving is different definitely. In the caption to the photograph of the jug, it is described as ' Plate 148.Jug with applied lion masks on feet.
Probably (my underlining) designed by James O'Fallon at Thomas Webb and Sons, 1870s. Height 5 3/4 " (14.5cm) Michael Parkington collection'. Admittedly, it is referenced in the book main writings on that same page and the way it is written makes it appear it's being described as by Thomas Webb designed by James O'Fallon.
Bonhams in your first link, don't give a height for the jug I don't think. Though it will be less than the 26.5cm height given for the claret decanter as it's smaller in their photograph.
What height is your jug?
This is an example of what was shown from Holyrood glassworks in the 1880 Melbourne catalogue
Jug and glass - not the same as your jug though - very different:
https://www.google.co.uk/books/edition/The_Official_Catalogue_of_the_Exhibits/-7CblBiEoDMC?hl=en&gbpv=1&dq=jug+holyrood+glass&pg=PA269&printsec=frontcoverSource 'Official Catalogue Melbourne' page 269
I couldn't find a reference to the Sydney catalogue with any pictures.
Just for reference on this thread, the Bonhams first example was sold recently with that information of Holyrood - in 2021