Any thoughts ?

[Keith Orpin]

Guys,
When I rebuilt my C30 a few years ago, a stamped X was found on the front of the cab, (see picture). Seeing that this was part of her history, I kept it visible, rather than filling it , not really knowing what it stood for. Imagine my delight in seeing, a certain C60X in France recently, with the X stamped in the same place !, and only 2 months between build dates. On the last day in France, another CMP owner introduced himself to me, and in the short conversation we had, I asked him to check his Chev out, guess what, he also has an X stamped on.
Now, what did it stand for ? was it an inspection stamp ?, why have we only seen it on Chevy's, or was it for vehicles coming down the line that were to be fitted with special bodies, or maybe eXport. So far, I have only seen this on 3, 13 cab Chevy's. So , who else has come across this, and what are your thoughts
Regards
Keith