Allow me to throw another wrench into this conversation.

While I can see that second set of numbers as described on my internet window copy of my Ex, the original does not show that second number and also, this 'build date' is wrong for my Ex by 2 days. I have a copy of my build sheet which comes with the Ford maintenance manual I have and it shows the actual build date as 12/08/16. Along with that additional info shows the date the warranty started when I purchased the Ex, same day. Now, looking at the method of transportation on the current Explorer window sticker, it says 'convoy'. On previous window stickers that I have, all Ford, it says, 'rail'. So, convoy or rail, is their meaning one in the same as both
may mean transportation by train? Probably. The Ex is built in Chicago and I don't really see them throwing them on a tractor/trailer for transport half way across the country to my berg. Rail transportation offers better protection as the rail cars are somewhat, enclosed so, I think the wording used was just changed with the same result.