I have recently picked up some old bottleings of varous Bourbon Whiskies and dare I say it,
some Japanise Whiskey as well. A couple ( I picked up two old Benchmark's) have the Federal Tax stamps marked "Bureau of Distilled Spirits" on
them and they have no Warning Labels. The others have no tax stamps but have no warning labels and one
(A bottle of Johnny Drum) has a makeshift warning label glued over the regular label.

My questions are:

1. When were Federal Tax Stamps last used?

and

2. When were the warning labels first required on domestic and import spirits bottleings.

Answers should help me date these interesting Bottleings.

Thank you,

Mark