The larger number would be the mold number,, the next would likely be the factory size designation,,and they do not always make sense to me,, the black is the decorators number or initials or whatever they choose to use !! That is why they are a different color from the factory marks !!
Where did you get this item ?? Its not a very old piece !!
The humidor should be from at least the late 1800’s based on the family history involved. What would you estimate the age to be when you say, “not very old”, please? Thanks for your assistance.