The code on the back is CCUE. This means February 1999.
Unfortunately, all the stickers on the box are missing. That's why you can't identify the cigars. I had a case like this recently. The green seal was missing from the box. Nobody, not even the importers, could verify the box.
The only option is to send the box to Cuba, to Habanos. One or two cigars are opened there. The authenticity can be determined on the basis of the tobacco. The whole thing is at the expense of the owner of the cigars. It's far too expensive, of course. My tip: smoke them yourself and store them properly.