Looks EXACTLY like a cat we had when I was a kid. Through all the tormenting (me of him and him of me), he made it to 18 years young. That was a TOUGH cat. He was indoor/outdoor (we lived in the woods), couldn't keep him in, regardless of what we tried...he always found a way out, so we just started letting him out...he'd come back beat up, stay inside for a week or so licking his wounds, then go back out hell-raizin'.
His name was trouble. He was a lighter-color of gray, but the patterns were EXACTLY the same.