When I served in the Navy we were paid in cash, and two dollar bills were frequently included in our pay.
did they look like this?
http://2.bp.blogspot.com/-F9qEgQIAtpw/U_PIR-EsdDI/AAAAAAAACLk/cIYfg0sYUaw/s1600/1875%2BTwo%2BDollar%2BNational%2BBank%2BNotes.JPG