B.C in a horizontal diamond stamped on the shank (maker unknown to me)
E.I over G.I over H.J.I stamped on the mount with marks for London 1888
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(information courtesy
@greeneyes)
Not sure when this particular Inderwick stamp was cancelled but it must have been around 1900 as
J.H.R into an oblong chamfered rectangle - John Horatio RISDON trading as INDERWICK & CO - London
is the stamp more likely to be seen after that date
+ H. Simmons LUXURIA FULL MIXTURE:-
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View attachment 62103
Watching THE MALTESE FALCON