Just came across this post and thought I'd chime in here. Jack Daniels distillery at one time labled their whiskey as being aged 7 years. So they apparently used to have a set age time (at least for the Black Label). At some point around the early 1990s they stopped labeling their whiskey with an age on the bottle. So it appears to me that around that time they were looking for another (maybe more efficient) way to get their mature whiskey to market without having to wait so long, relying now more on professional taste tests rather than set time limits to determine maturity . Also they seem to have reduced the proof for the Black Label from 90 down to 80 recently. Now both Green and Black are both 80 proof. Despite these changes made by Jack Daniels in recent years what is amazing to me is how they have managed to produce a very consistant taste throughout the decades. The taste of the recent product (both Green and Black) has not changed or varied much at all when comparing old bottles from as far back as 80 years ago to recently release bottles of today. They must be doing something right at Jack Daniels!!
The Green Lable is too often seen and regarded as the low-end stepchild Jack Daniels product, but it is more than worthy in my opinion. It's pretty good stuff, I like it in an old fashioned glass, no ice, just neat. A real man's whiskey that has remained true to it's roots. I wish more things today would remain true to their roots. The Green Label is actually the original Jack Daniels Tennessee Whiskey and the only one of the distilleries whiskeys that Jack Daniels himself would have known in his lifetime. The Black Label wasn't created until 1912, a year after Jack died. Lem Motlow created the more mature Black Label in honor of his uncle Jack. How do I know all this? Well when you've known Jack as long as I have you are sure to pick up lots of information about the regulars in your life over the years ;-) I also like Wild Turkey 101 proof too.