Carte de Visite of an Unidentified Victorian Policeman, London, est 1875
The style of the badge on the Custodian Helmet leads me to believe this photo dates from 1875 or later, though the style of the photo itself suggests it is no later than around 1885. If you are able to date this item further, please leave a comment below.
Unfortunately I can’t quite make out the number / markings on his collar, which may be useful in aidingin identification. Again, if you can help, please leave a comment below.