I think some clarification is in order. According to Padron's website, the "thousand series" are sun-grown habano wrappers aged 2.5 years. The 1964 series are aged for 4 years.

I could be mistaken, but aging tobacco as a leaf is a more common method of aging tobacco than aging a cigar is. If I remember correctly, when aging the leaves, careful consideration is placed on the humidity and rotation of the tobacco leaves as they ferment. After the leaves are picked and dried, the leaves are carefully stored and inspected so they don't get too humid and are unusable.

I read something a while back, or saw an interview with Tatuaje's Pete Johnson, where he was interested in creating a cigar where the tobacco would be aged while the cigar is rolled. I know he created his RC line with half of the cigar wrapped in foil similar to the way Cuban cigars used to be. I can only think of one Cuban cigar that does that now, the Bolivar Gold Medals. I'm sure there may be others.