I have not recently kept us with the various coding designations used on Majestic Authentic Collection jerseys. Recently, I have been seeing 0630 codings on its Cool Base jerseys and began wondering.

Is the 0630 the same as what I used to see as 0063 coded items or is the 0630 coding for another line of issue? If there is a difference, what are the significant aspects of the difference(s)?

Any information on the coding would be much appreciated. Thank you.