Recently I found a Bonded Gran-dad with the "non-years" green paper seal, i.e., the one issued at the end of the stamp era. The bottle shows the new (current) label design but states the whiskey was distilled and bottled by "The Old Gran-Dad Distillery Co., Frankfort, KY - DSP Ky. 14". No reference to Clermont anywhere.
On the base is embossed a 92 and in a corner of the front label, F-91. Clearly the label was printed in 1991 and the bottle was made in 1992.
This being all Frankfort manufacture, it must have been made in the last year before the purchase by Beam. Yet it has the new labeling associated with the later Beam-made product. Were many of these made? The taste is old school ND though.