Alfred tipped me off that there may be another "16" stamp, by the trunk lock latch, and sure enough there it was. The folks at the classic center sent me pictures of an early car they just finished restoring, #279, it also had the absence of a data plate near the hood latch, just a vin stamp. Additionally, the folding top instructions sticker is in the glovebox door, never seen that before. Fun stuff. Rough as the car is, these are the details that make it fascinating to me.