Obviously the note is a bit out of my collecting genre, but I purchased it to give to a family member as a gift. I am just impressed with it's size. There are varying accounts on how many of these are known to exist, but the best guess is about 60-100 or so. Other denominations are known to have been issued, and usually if they are still in existence they are unique. They are a bit of an enigma, there is not even a precise date as to when they were found, by whom, or even where. Most accounts agree that they turned up in an idol that was being dismantled in Beijing anywhere from ca. 1900-1936 and that the finders of them, the workmen sold them to passersby.