
Vacheron Constantin pays such close "attention to detail" on every timepiece. Their finishing is at such a high level, on the Malte Regulator Tourbillon for example, that they spend eleven hours hand-finishing each tourbillon bar.
Some of the exceptional finishing operations on the 1790R movement can only be done by hand, particularly in the case of the bar. This work is known as berçage or rounding-off. Always a technical challenge, it consists in filing the tips of the arms with perfect regularity in order to give them a conical and semi-cylindrical shape, while carefully marking off the centre and heels. To complete the operation and obtain a perfectly polished rounding-off, the craftsmen polish it with stones, buffs, wooden pegs and finishing pastes. No fewer than eleven hours are needed to meet the stringent finishing criteria required by Vacheron Constantin. The Côtes de Genève decoration, the meticulous hand-chamfering of the edges of the bridges and the engraving of its individual manufacturing number confirm the 1790R's exceptional character. Besides its tourbillon, this manual-winding movement features a 40-hour power reserve indicator.
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