The breakdown for General Electric Serial Numbers is:
1st Alpha Character = Month Manufactured
2nd Alpha Character = Year Manufactured
| GE (USA) - Month Code | |
| Code | Month |
| A | January |
| D | February |
| F | March |
| G | April |
| H | May |
| L | June |
| M | July |
| R | August |
| S | September |
| T | October |
| V | November |
| Z | December |
| GE (USA) - 12 Year Cycling Code | |||
| Code | Year | Year | Year |
| F | 1991 | 2003 | |
| G | 1980 | 1992 | 2004 |
| H | 1981 | 1993 | 2005 |
| L | 1982 | 1994 | 2006 |
| M | 1983 | 1995 | 2007 |
| R | 1984 | 1996 | 2008 |
| S | 1985 | 1997 | 2009 |
| T | 1986 | 1998 | 2010 |
| V | 1987 | 1999 | 2011 |
| Z | 1988 | 2000 | 2012 |
| A | 1989 | 2001 | 2013 |
| D | 1990 | 2002 | 2014 |
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