Just as I spoke about the dead-seconds Hy Moser Esculape equipped with a Chezard 116 caliber, today I would like to underline the unusualness and rarity of the legendary Rolex Tru - Beat Ref. 6556 also equipped with a dead-seconds movement (Cal. 1040 - base 1030). It is a watch that has reached really important market prices and I don't think there are many specimens left with perfectly functioning mechanics; the cal. 1040 was (and is) in fact renowned for its fragility....let's say it really liked going under the watchmaker's knife...