Excellent find Thai !!
very informative for those buying new tires.
I just checked my Revos
Code 4005 = 40th week of 2005 (mfg date) I installed them 806 = which would be the which would be the 8th week of 2006.
Made in Japan is also something I did not know , but found in the fine print.
I also checked my other set of Bridgestone AT ( non Revos ) on the ever so capable off road expedition / race vehicle Ford Escape.....lol.
Code of 0805 = 8th week of 2005 , which is approx. time they were installed , so they were fresh for the off road racing circut.