Up until 2003 Utica useda month/year code. The month was A - L. The year was A + 1984 through Z = 2002 (except for 2000 when they used 9 for units made from jan - aug and X for units made sept - dec). In 2003 they started using a sequential code.
Utica Boilers - 315-797-1310.
August - 2002
Hope that helps.