In 1987 Fender opened the Mexican plant in Ensenada, which became operational and started to produce guitars only in 1990.
The serial number of the “Made in Mexico” Stratocasters, was located on the front of the headstock, is very simple and intuitive: it provides a suffix composed by the letter “M” and one indicating the decade (“N” for the 90s, “Z” from 2000 and “X” from 2010), followed by five or six numbers.
In 2010 also for the Mexican Stratocasters, as already happened for the American ones, a serial number without letters but composed by the prefix “10” followed by seven numbers was used for some months. In these cases the origin of the guitar was reported on a decal placed on the back of the headstock next to the serial.
Moreover in 2010 the serial number was moved on the back of the headstock of the Mexican Stratocasters.
Obviously, there are some exceptions, like the California Series, whose serial number was characterized by the prefix "AMXN", and some signature guitars, with the prefix "MS" + "N", "Z" or "X", according to the decade.
It is interesting to note that some of these, like the Jimmie Vaughan or the Buddy Guy Standard Stratocaster, had the serial number with the prefix "MSN" also if made in the 2000s (and not '90s as you might think). In these cases the real dating of the instrument has to be done by reading the other dates on body, neck, pickguard or thanks to the 1996 anniversary tags placed on the back of the headstock.
In addition, in October 2010 also Mexican signature strats moved to the serial number "MX10".
The serial number of the “Made in Mexico” Stratocasters, was located on the front of the headstock, is very simple and intuitive: it provides a suffix composed by the letter “M” and one indicating the decade (“N” for the 90s, “Z” from 2000 and “X” from 2010), followed by five or six numbers.
In 2010 also for the Mexican Stratocasters, as already happened for the American ones, a serial number without letters but composed by the prefix “10” followed by seven numbers was used for some months. In these cases the origin of the guitar was reported on a decal placed on the back of the headstock next to the serial.
Moreover in 2010 the serial number was moved on the back of the headstock of the Mexican Stratocasters.
Obviously, there are some exceptions, like the California Series, whose serial number was characterized by the prefix "AMXN", and some signature guitars, with the prefix "MS" + "N", "Z" or "X", according to the decade.
It is interesting to note that some of these, like the Jimmie Vaughan or the Buddy Guy Standard Stratocaster, had the serial number with the prefix "MSN" also if made in the 2000s (and not '90s as you might think). In these cases the real dating of the instrument has to be done by reading the other dates on body, neck, pickguard or thanks to the 1996 anniversary tags placed on the back of the headstock.
In addition, in October 2010 also Mexican signature strats moved to the serial number "MX10".
Tab.5 Mexican Stratocasters serial numbers
1990

MN0 + 5 or 6 digits

1991

MN1 + 5 or 6 digits

1992

MN2 + 5 or 6 digits

1993

MN3 + 5 or 6 digits

1994

MN4 + 5 or 6 digits

1995

MN5 + 5 or 6 digits

1996

MN6 + 5 or 6 digits

1997

MN7 + 5 or 6 digits

1998

MN8 + 5 or 6 digits

1999

MN9 + 5 or 6 digits

2000

MZ0 + 5 or 6 digits

2001

MZ1 + 5 or 6 digits

2002

MZ2 + 5 or 6 digits

2003

MZ3 + 5 or 6 digits

2004

MZ4 + 5 or 6 digits

2005

MZ5 + 5 or 6 digits

2006

MZ6 + 5 or 6 digits

2007

MZ7 + 5 or 6 digits

2008

MZ8 + 5 or 6 digits

2009

MZ9 + 5 or 6 digits

2010

MX10 + 6 digits
10 + 6 or 7 digits 
2011

MX11 + 6 digits

2012

MX12 + 6 digits

2013

MX13 + 6 digits

2014

MX14 + 6 digits
