Brother Facsimile Equipment MFC7420 - Manual (Page 249)

App. 1-1 Confidential
SERIAL NUMBERING SYSTEM
Individual machines have a serial number label for the machine itself and a property label for the
head/carriage unit.
This section lists the coding information for those serial numbers and property codes.
(1) Serial number label for the machine itself
Location
Serial number (6-digit)
Product item code
Factory
Production year
(Example) 4: 2004
5: 2005
Production month
A: January G: July
B: February H: August
C: March J: September
D: April K: October
E: May L: November
F: June M: December
Serial number
Serial number label