Very Old Montecristo cigars and Box

I am posting quickly before work and can give much more details and photos to anyone with more knowledge of this.

I cleaned out my wife's grandfathers house after his death and recovered a Montecristo Humidor type box with numerous size compartments for each different size cigar. The box has the montecristo logo inlayed on the top and inside has her grandfathers name and the montecristo logo branded into the underside lid. They are pre-embargo and the tax stamps are taped to the inside lid. There are numerous size cigars in the box and her grandfather smoked up until he passed so he did keep them fairly well. They were not in the best condition when I found them but did still have a slight spongyness to them.
The odd thing is under the regular montecristo band is an additional smaller rectangle band, yellowish in color with "habana" and other writings ( I dont have it in front of me right now) and this secondary band is stamped with a red stamp that says "AMISTAD 1939" ...it seems like this is some type of anniversary issued large sampler type set or something. I don't know for sure that they are from 1939 but her grandfather did pass at age 98 .
I began researching these a couple years ago and got as far as talking to an old man at a cigar factory in florida that used to work at montecristo in cuba many years ago. He believed that somewhere in Cuba would be records of the purchase of this box since it was branded inside with her grandfathers name.
Again, I have pics and can send more info once I find someone that has extensive knowledge of montecristo cigars.