I have recently acquired a private collection of imports. I would guess by the look that they have been aged decades. All are sealed, and many still have foil wrap. I am having trouble with dating these bottles, as no dates are listed on the labels or bottles themselves. Some of these brewing companies I believe to be shut down, I cannot find information on them. Should anyone have interest in my plight, and have source of information that I may use, please contact me at Kaija1982@care2.com