A friend of mine used to work for a regional distributor for Jack, he told me there is a blue label, it is VERY rare and the only place he had every seen it (and sampled it) was at the Distillery in Lynchburg. He had rarely seen it sold commercially because of it's prohibitively high cost. I have no idea what makes is special, but my friend said it was the smoothest drink he had ever tasted, and that included some very old single malts.