I can't imagine this type of information would have ever been made available to the public by the manufacturer. Sounds like something that would be kept 'internal' (confidential).... Have you tried contacting Olight?
my R40 serial starts with E 2014 which is actually when I got it. My M2X UT starts with F 2015 which is also when I got it. Same with my M3XS UT an F serial 2015 once again also when I got that one as well. Id say the list is correct.