In the past three decades we have literally purchased
thousands of original hoses from GM. We also have had some formed hoses
manufactured independently as reproductions and understand well how they
are made and marked.
Below are a few photos of genuine GM radiator hoses that
shows how the same hose can be identified with the same information but
with a different font and even in a different location on the part. Any
Corvette judge who says otherwise has not seen a manufacturer mass producing
these parts. These are as typical of GM production in 2009 as in 1959.