Grease pencil marks behind headlights

[badali]

While changing my head lights I took a picture of the grease pencil marks still present after nearly 50 years.  A neat little artifact left behind at the factory...

[Jonny B]

Automotive archeology! Cool stuff.

[sandcrab59]

I noticed when I stripped down my seats (Dark Red Leather) they had matching numbers ( 3 digits) probably Grease Pencil on each piece of leather. (Which I saved for posterity).
Also when stripping down the Dashboard the same numbers appeared on the backside of each piece also the door panels.
this way I know it is all original from the factory.
they could be elsewhere but I have not seen any as of yet.

just for information for those who never stripped out major parts of there SL's.
Mine is a 1971 280Sl (Mfg 2/71)

Tom M