there are ways to check the old seal (micro text/uv etc) and ways to check the new - you can allso tell by the roll (looking at the foot)...
the best way is to spark one up.

The serial number consists of two letters and six numbers, and the first letter of the Serial Number "should" correspond with the following box date code. The second letter appears to be somewhat random. Any serial number on the warranty seal commencing with XX or XY has been opened and inspected at the Habanos SA facility as part of their quality control and these boxes may have a "REVISADO" (reviewed) stamp on the base of the box.
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