Dunhill hallmarks

Hi, i’m new here so please bear with me, i’ve bought a vintage Dunhill whiskey flask with the hallmarks below, i’ve know idea what they mean, i’ve searched on the net to no avail, it may well be plate but i’m just not sure. Can anyone help me identify what each of the marks mean ?

many thanks for any help.

These are not hallmarks so your flask is not silver. It is, at best electroplated, and may even be pewter.

many thanks, i was confused as the surface is so hard, im guessing its electroplated .