58 minutes ago, johnnyd said:
With a bottle this old, it's curious that the contents hasn't seemed to age, like turn a gold color.
Because the gold color comes from the (toasted) wooden cask the alcohol is stored in. Ethanol and its watery dilutions do not „age“ in inert material, e.g. glass, stainless steel etc. in terms of color, which is nostly an extraction process.
They do undergo reactions, e.g. acidic compounds present in the distillate form esters with the ethanol, so there is a bit of chemistry going on over the years. However, this is in sub-o/oo concentrations. It does not affect the color much ...