As advertised on the rare Opal Glass Jar insert card.
The jar comes complete with lid and plastic snap cover
(shown here with the reprint card).

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The wording on the snap plastic lid says
"Brooke Bond Crown Cup Instant Coffee".

The scroll pattern on the jar is the same as that on the Opal Jar card.

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Both the original Opal Glass Jar insert cards
and the Jar itself are very difficult to find.