A:Answer Serial number beginning:
M means year 2021.
N means year 2022.
For 21 year, The number is the month of manifacturing.
So, N4 has been manifactured in April 2022.
Mine is MANRK and on the bottom of laptop it is 10 2021.. No clue how that works out.
Try to get one that starts with N you can see the serial on the side of th box without opening.. only the date can be actuallly seen on the bottom of the laptop itself.