Production date of Cali-roof hammerd in chassis....?

[Hotel California]

Anyone noticed there are numbers hammerd in the chassis at the back of the roof above the 3th breaklight , at least on my 2012 Cali it is.
When the top is open it's visible if you stand on a ladder or when you'r an NBA player
Saw it this afternoon wilst cleaning the Cali after a two weeks trip.
It starts with 14 12 PNG , then underneath it says a larger nr/letter code

Any sugestions of what it might be ?
I'm thinkin about a fabrication date , could be week 14 of the year 2012 ....mine is purchaced in juli 2012