Dating old Plumcake and Erinmore

[Abuzer]

Hello Fellow Pipesmokers,

I came across some very old Tobacco you see attached - Do you have any Clue how old it might be?
The Person I acquired it from told me, that the smoker of those tins died in `95, so they are surely older than that.

Any clue is highly appreciated.

regards
Abuzer