Dating of old cigar boxes is often troublesome. The quoted material below seems comprehensive, but I have no way to judge its validity. Click the link at the bottom of the quote, for more extensive details.
These indicators would date the box between the mid-1940s to 1961, although the "Hecho En Cuba" seems to have changed from English (Made in Havana-Cuba) to Spanish only after September 1960.
Bob
EDIT: Another issue that arises is that if the box was purchased in the US, I would expect it to also bear a US tax stamp.
Cuban Cigar Website said:Aluminium tubes first appeared in the mid-1940s and were quite common by the 1950s.
Semi-plain more correctly applies to pre-WW2 boxes, where the dressings did not cover the whole box. Until the mid-1970s, the boxes were constructed from solid cedar, after which time it changed to cedar veneered plywood.
Pre-September 1960
Warranty Seal 1931 to 1961, with perforated margin.
http://www.cubancigarwebsite.com/info-packaging.aspx
These indicators would date the box between the mid-1940s to 1961, although the "Hecho En Cuba" seems to have changed from English (Made in Havana-Cuba) to Spanish only after September 1960.
Bob
EDIT: Another issue that arises is that if the box was purchased in the US, I would expect it to also bear a US tax stamp.