1890 Treasury Notes represent some of the rarest, most alluring pieces of United States currency extant. With its stunning back and flawless face, this note is set to take off. What may be the most extraordinary fact is how rare these notes are. A quick look at the census will reveal there are only 162 examples known for this Friedberg number. Further research will reveal that there are only 343 $10 1890 Treasury Notes known for all Friedberg numbers! And with most Fancy Backs in circulated condition, finding a nice example in uncirculated condition is more difficult than most people realize.