Casual said: ”Interesting idea. What homework allows one to tell if a vintage tobacco inside a tin is recoverable or not?”
You cannot ever be sure that the contents are smokable, but you can research the years that tin was made, make sure you are getting the tobacco from the era you are desiring. Also, you can do a little research on other people’s outcomes with older tins of your chosen blend’s long term viability. Lastly, buy from a reputable dealer and don’t be afraid to ask for more pictures of the bottom, seams along the sides etc.. Ultimately it’s a crap shoot, but a little knowledge can help the odds in your favor.