I know enough of the Cyrillic alphabet to read the word "rubles" after the "1000", so that would probably indicate Russia. Russia is, AFAIK, the
only country that uses rubles today out of about a dozen countries that use the Cyrillic alphabet. I don't know if other countries may have used rubles in 1919, though.
If you can post a closer-up scan of the text I might be able to decipher some of it. It's too small to read with this scan.
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Edit: Belarus and the self-declared independent republic of Transdniestr (actually a part of Moldova) use rubles today in addition to Russia.
Anyway, your note is a Russian note; it is catalogued on this page as P-S418b:
http://aes.iupui.edu/rwise/countries/russia_specialized.htmlThis British site is offering the same catalogue number for GBP 3.00 for EF/AU:
http://katespapermoney.co.uk/item.asp?ID=2411