Norton/Cynthiana is a variety of grape unique to the United States.
I've been dying to try it, but you almost never see it west of the Rockies. I've been trying for years to find a vineyard that will ship to Nevada, but no dice. When I found a bottle of it at my local Total Wine, I literally yelped in delight and startled the poor guy next to me.
The label on the bottle suggested letting it rest for 7-10 years, and next time (and, oh yes, there will be a next time) I'll do so.
Color: And you thought Petite Sirah was dark! This wine is inky red-black in color.
Nose: Plums and cherries and yeah, it smelled sharp.
First Impression: Cherries, plums, and concord grapes, but a very dry concord grape note, and then a loooooonnnngggg finish of spicy orange peel. The wine was quite sharp overall, very tannic.
Breathing room: Still a bit sharp and tannic, mouthfeel was still astringent. (My next bottle's going to hang out in a cool dark place for 7-10 years.) Cherries, and plums and the spicy orange peel finish is now something between "Constant Comment" tea and a blood orange. There's definitely a note of cloves and blood orange in the nose after it breathes a bit.
This is right up there with Gewurtraminer and Pinotage in terms of the unique and distinct flavor department.
Should you wrangle a bottle, I suggest pairing it with something spicy (but not spicy hot) and tangy flavored: hearty Eastern European food, or ribs with a good vinegar-base sauce.