Binoculars WW1 British info needed

[monochrome]

Hi
i have a pair of binoculars that i'm trying to research.
I can't see any marker marks, there are two large broad-arrow stamps.

Other markings are:
LIEUT H. M. ROBINSON
NORTH STAFFS ?? REGT (?? = a bit hard to read)

They are also marked: Regd No.644526 Pat.No.23825
which according to Google may make them W.Watson & Sons Ltd 1916?
Leather case is stamped inside: Ross Ltd. 111 New Bond St London
I am curious to know more about the binoculars
and who may have been the original owner.
I did find a Second Lieutenant Harry Robinson that may be him, not sure
https://livesofthefirstworldwar.org/lifestory/4146841
Any suggestions or help please
pete

[Jerry B]

Sounds like you have found out most of there is to find out, though perhaps you might find more on him.

Try getting the War diary for his unit from the national archives as officers are usually mentioned by name.

[monochrome]

Thanks Jerry i'll have a look
Can anyone confirm they are Prismatic.No.3 Mk.1 W.Watson & Sons Ltd 1916?

[thorne83]

Looks like your man was a Gallipoli campaign vet. Cheers, Tom

[thorne83]

He was born in the last quarter of 1889 in Lewisham district, London and died in Malvern in March 1981.
Here are two more docs:

[monochrome]

Thankyou gents great info