I have been friends with this whisky for 15 years or so now, however it occurs to me that the bottlings now are different from the ones in say 1990. The labels look identical for all intents and purposes, how do I tell the 2002 25 year old from the 1990 25 year old appart? Does anyone have any 'secret codes'?
Does anyone know the actual age of the whisky in the assemblage currently?

