Very Old Johnnie Walker Red Bottle - How Old?

I also recently acquired an apparently very old bottle of Johnnie Walker Red Label, and am interested in finding out its age and estimated worth. It appears to be sealed with a driven cork, and the bottle is light blue with some apparent air bubbles and imperfections. I've attached several photos, with close-ups of the seal and label. Please let me know if you need any additional information. Thanks!