Help with hallmarks on silver pocket watch please.

Please can anyone help identify these marks? There is no name on the watch face or elsewhere. There is a lion and letter k hallmark but I cannot make out the third one. Ther are the letters AW.RG and the number12185. All these appear in the inner and outer case along with oz 21/2.
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The hallmark shows that the watch case was assayed in London in the assay year 1885/86 (your third unidentified mark is the uncrowned leopard’s head for London). AWRG is the makers’ mark of Waterfall & Gravenor (Albert Waterfall & Robert Gravenor) of Coventry.