Dewars scotch bottle dating
The oxygen in the air oxidizes the whisky, which can impact the flavor.
Alternatively, you can always use wine preservers like Private Preserve.
Private Preserve is nitrogen, carbon dioxide, and argon – all of which will not oxidize your whisky. On the back is that odd statement "Made prior to September 8th, 1917".The bottled in bond tax strip is missing so we can infer that this is probably a 1917-1928, or possible a 1916-1927 (or a 1915-1926).It's fascinating to see that its roots are in PA rye.Stewart's is one of the brands of Maryland rye that disappeared with Prohibition.