cwdjrxyz > wrote:

> I have the Madeira in my wine machine under pre-purified
> nitrogen, and it should keep well for many weeks if I do
> not drink it all before then.

No need to. Vintage Madeira is practically indestructible and can
be kept open for years, even decades.

Three years ago, after a trip to Madeira, I visited importers here
in Vienna to taste some of their wines (as addition to write up an
article). At one place I had the last sip from a bottle of Oliveiras
1795 Terrantez that was opened 12 years before, when the importer
just had started his business. Absolutely terrific it was!

M., commemorating this event right now with a sip of Barbeito
Malvasia Special Reserve 20 Years Old, open since three years,
and tasting exactly the same as on day one.