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Thank you for your patience.
The information you requested is the following:
The serial number of the Edison module is divided in 4 sections.
The first section (4 first letters) is divided in two parts: A1 and A2. A1 are the first 2 letters, this is a reserved number. A2 is “”ED”” in case you’re looking at the Edison module. A2 is different for the Arduino and mini breakout boards.
The second section (next 4 characters) is divided in 3 parts: B1, B2 and B3. B1 is 1 number, equal to the last digit of the year manufactured. B2 is the world week the unit was manufactured. B3 is the form factor. B3 can be B=baseboard or D=daughterboard.
The third section (next 5 characters) is a sequential number.
The fourth section (last three numbers) is the number of the bill of material revision.
We are working on posting a knowledge article containing this information. This article will be available soon.