I have a case or two from around the mid 80's if anybody is game.
It is not totally crystallized, dark as molasses. I haven't got the nerve up yet.
Some sitting in the kitchen window is a mix of wildflower and sourwood, the wildflower settled to the bottom and crystalized, the sourwood is on top and still liquid. It is starting to turn a little darker. Been in the window for, I'm not sure, but about 6 or 7 years. Was trying to see if mixing the two honey's together would stay mixed and all crystalize at the same time. I knew the wild flower would crystalize in about 6 to 8 months and the sourwood would take several years.