Purple Delirium: Rare Diamond-Concord Tres Mince, Important
Concord Delirium Très Mince: Swatch & Magique, Rare & Important Factory-Diamonds
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WHY WE LOVE IT: There are just a few that important and special and rare watches in the second half of the 20th Century: a high-quality quartz-milestone in a innovative and important case hand-made by Favre & Perret: 1.98mm only.
A rare and important watch: The model for the best-selling Swiss watch Swatch, for the automatic Audemars Piguet Ra-Tourbillon and for the modern Piaget Altiplano -- all using the Delirium I innovation of using the case-back as movement main-plate. Besides this, it was the thinnest quartz-watch (less than 2mm inclusive crystal) and thus the winner in the race-to-miniaturization and in the early '80s one of the hottest and most expensive watches -- Concord Delirium Tres Mince (sounds Tremens).
Sure, we can go into discussion, but I think I hold a good and excellent defendable position when I call it one of the most important watches of the last five decades. And it is not only important in a horological sense but it is also quite rare. The reason it is so rare is two-fold: it was very expensive (the basic-model without diamonds was priced DEM21'000 in mid 1979) and it was made just during a short time-span and in low quantities until it was replaced by the more robust Delirium II.
