Hello all,
This pocket watch was passed down to my parents when my grandfather passed away, but we don't know hardly anything about it. I've been trying to do some internet research on it but I don't know if I've gone off track (because quite frankly I don't have much of a clue about dating pocket watches!).
I'll leave some photos here, and some information about the detail on it in case the photos don't turn out great.

Holly
Inside of back cover: 4 hallmarks, one of a lion’s body with front leg raised (probably a standard silver mark indicating Sterling .925), one of either a crest or lion’s head, letter ‘A’ (according to
http://www.925-1000.com/dlc_london.html the A looks most like that of the year 1876), and makers mark ‘L.W H.H’ The HH part, according to
http://www.silvermakersmarks.co.uk/Makers/Sheffield-H.html#HH may refer to the Harrison Brothers who were based on Norfolk Street in Sheffield.
+ number 16297, with the letter D below.
+ series of scratched in marks, possibly from repair – looks like it says the following; ‘8177 [triangle] 54-7 1861-8 4754’
Opposite back cover inside:
+ [image of a crown] ‘Wm Brown 62 High Street Sheffield’
Side opposite inner watch mechanism:+ three hallmarks, ‘L.W H.H’, and then two hallmarks as before of lion with raised front foot, and the capital letter A. Number 16297.
+ scratches into surface, very faint and hard to read. Possibly says ‘12177 GS’, and then ‘SWC 249B’ then possibly in tiny scratched in writing ‘211T816’ or ‘2 11 1816’. ‘11 3-15’ in bigger writing.