Hi Scrooge,
If your tin has the Dunhill name in script on a painted label, flat tin bottom and no large white round sticker on the bottom, then your tin is 1996-2005 production. If the Dunhill name is in block lettering with no Royal Crest, then it was made between 1986-1995. If the Dunhill name is in block lettering with a Royal Crest then it was made between 1981-1986. If the top label is paper with script lettering it is 20008 to present. Oh, an if the top label is paper and the Dunhill name is in block lettering with royal crest, it was made in 1980 or perhaps 1981. Hope this helps.