Can anyone help me to identify these marks?

British Silver Reading Silver Hallmarks
1

I bought a silver watch recently. Is there anyone who can tell something more about the hallmarks? I would like to know more details of the watch. Thank you for your help.
zil15-500.jpg
zil15-merk500.jpg

2

Hi, the marks are the import mark for London, the date letter ‘b’ for 1917/18, the .925 is for sterling silver on imports and WHS is William Henry Sparrow whose mark was registered in London in 1907 and in Birmingham in 1903. Hope this helps.
Regards,
Tony

3

Tony,

Thank you very much