Help with symbols on fender tag

[XH29N0G]

Can someone tell me what the outlined symbols on the fender tag are there for? 

[Mytur Binsdirti]

Those are the sacred signs of the illuminati.

[Dodge Don]

http://www.1970chargerregistry.com/mboard/index.php?topic=2010.0

[XH29N0G]

Thanks, that is cool.  Inspection stamps.  I also see numbers now that I look in the bottom of the creases.  Thanks.

[BROCK]

Sometimes it's easier to read from the backside  
All of my cars are from St Louis.  Those marks don't show
up on 72 & 73 tags.  Are they there for 71?

[Ghoste]

But mytur isn't completely wrong either. 

[XH29N0G]

But mytur isn't completely wrong either. 

So true

[69CoronetRT]

Are they there for 71?

Yes and no. 71 STL seems to be more sporadic than earlier years. Some tags have them, some tags don't and sometimes the punch is on a second tag. I haven't studied the 71 tags that closely to see if there are any date ranges or other correlations to having the punch or not.