Probably grease pencil markings made by some mechanic when they serviced the car. We used to do that all the time for coolant checks - just not that big and obnoxious. That would be my guess ...........
I hear you guys but the date on the right is Feb 3 1970. This is a 1970 car. I doubt it would have been serviced that quickly coming off the line. Just my thoughts!!!!
Would have been checked at the dealer, before delivery. What's the vin? Does it have a stick, or a data plate? 1970 Mavericks had been in production for 8 months or so, by Feb 1970.
Then it's the 136680 scheduled for production so was built well into the '70 model year... What's the date on the data sticker???
I will look tomorrow. Is the data sticker in the driver side door jam? Did you mean 236680 scheduled for production?