Always verify the legitimacy of individuals or organizations before sharing personal info or making payments. Do your research. RSA is not responsible for losses or damages caused by scams or fraudulent activity.
Go to the RSA Home Page. Click on the heading Manufaxture Date. Find the heading "Barrel Code Location Diagram and click on that heading. You should find your answer there.
If you go to the site, you will see your marking. I understand what you are seeing and felt the diagraam would give you the information you want. It is an inspectors stamp.
Loren