The Black River Bank of Watertown, New York was established in 1844 and ran until 1864 when it became the First National Bank of Watertown (Source: Haxby).
The following denominations exist for this bank: $1, $2, $3, $5, $10, $20, $50 (Source: Haxby). Shown below is a counterfeit example of the $3 note (Haxby NY-2845-G6f).
$3 Black River Bank, Watertown, NY (1862)
Image Contribution: Handini