Hello and thank you for your answer.
For this board, in memory the serial number is 2036SBB01021.
-> In official BBBK documentation,
# 2 first digits is the month of prod,
# 2 next digits is the year,
# 4 next characters, the board identification (BBBK for previous version),
# the 4 last digits, a production unit id (for this batch).
-> In the BBBVC version,
# the 2 first seems to be the year,
# What about the 2 next digits (36 doesn’t correspond to a week of June month)
# Is the version ID is on 3 (SBB) or 4 (CBB0) characters?
# Seems to be the 4 last digits of prod unit ID. What happens if this number is > 9999.
Thank you