To whom it may concern,
As regards your question about the lot number, please be informed that we are using the certificate number of our inspection certificates as the lot number also. Therefore, the lot number for M20 S10T is DW161114-QA-1A and that for M22 is DW161114-QA-2A as per the attached our inspection certificates. Attached please find our inspection certificates for your reference about the lot number.