(Posted by Greg on another forum...)
Year, Month, Day plus the line it was tested on and the number unit it was that was tested at that station for that day. Two examples here; the first is for a unit produced before 2010 and the second is after 2010:
A.) 5030305-0046 Manufactured on March 3rd, 2005. 46th unit on test station 5.
This uses the YMMDDTT-XXXX format where Y = Year, MM = Month, DD = Date, TT = Test Station, XXXX = sequential number unit tested on the station
B.) 10021501-0079 Manufactured February 15th, 2010. 79th unit on test station 1.
Same format as above except for two places used to show the year.
Rickie