Van Buren military trench swiss watch officer's WW1 rare unique silver authentic

Description

Military silver mechanical wrist watch in perfect condition.
Case
Solid silver case has English 925 silver hallmarks, makers mark W&H - Walker&Hall.
Case is in excellent condition,measures  49,5 mm in diameter (excluding crown),
is fully hallmarked for solid English sterling silver London (see photos).
Case marked nbr :57717
Age : 1919 ( marked «d»). 

Movement:
original hand-winding Vanburen Watch Co 10 jewels
The high quality Swiss movement sets and runs perfect and keeps good time. The watch was serviced a keep good time.

Dial: coloured and the hour markers are black Roman numerals. 
New quality black genuine leather watch strap.