Dating bottle glass
If it’s a dead distillery look it up and see how long the distillery was around for. Search for your bottle (by name) in Google Books under the magazines.Find ads that depict your bottle and you’ll know roughly when it’s from.You know that big block of text on the back of your whiskey that tells you not to operate machinery or be pregnant while drinking?If it’s not there then your bottle is likely from before 1989 when the Surgeon General’s warning became mandatory.The switch started happening in 1979 and some bottles from 79 / 80 will carry both on the bottle, but could still carry one or the other. Tax strips are the blue (if exported), green or red strips that go up the side of the neck and over the cap and will either say U. If it mentions the IRS then it’s pre-1977 which still covers a lot of time, but fear not.
Bill Lindsey's fantastic bottle identification and information site.
Look for any clues on the bottle itself that’ll pin point it. Some bottle codes are easy to decipher while others are not, but if they exist they’re a great place to start.
In the image above we see that it’s commemorating the 200th anniversary of Evan Williams and on the bottle they say the distillery was founded in 1783. If you can’t decipher them, and can’t find anyone else online who has a clue, reach out to the maker (if possible) and see if they can steer you in the right direction.
If the specific attribute is no known, you can enter "unknown," where allowed.
You must enter all of the attributes for the engine to function correctly and give an accurate estimate.