Identifying Russia P-37 Variety

From what I found on the Internet.
"They were developed by the Provisional Government in June 1917. They were issued under Soviet rule until the spring of 1919 (series from AI and above), despite the image of a double-headed eagle, an indication of exchange for a gold coin and an image of the State Duma building (hence the name "dumki"). The AA-AI series refers to the issue of the Provisional Government. In the autumn of 1922, they were exchanged for a new type of banknotes. The drawing is made in green, black, blue, beige, orange and light green colors."

From what I see, your banknote was issued already under Soviet rule.