Fancy Serial Numbers on any Treasury Notes are difficult to find. I recently acquired this Treasury Note with an almost a Solid Serial of B9333333*. It's one of only two known six-of-a-kind / six-in-a-row serial numbers. This next one is unique. The only 1914 $10 repeater serial note I've ever seen. Serial is G59895989A. This next note is an Eagle Note 1899 $1 Silver Certificate with a Super Repeater Serial Number of R89898989R. This final note is the only seven-in-a-row star that I know of on early $10 bill.