Dana decipher

[340Challman]

Hey All,
These are the numbers stamped on my Dana. I didn't notice the numbers up by the brake line until today. Looks like another date code. Does anyone care to toss out superior knowledge about why it looks like I have two date codes on my rearend?

[340Challman]

Well, I searched the internet and it appears that the early date is when the tubes were mated with the center and the later date is when the unit was final assembled. That thanks to Alaskan_TA. Interesting info.