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| | ThePuristS.com Girard-Perregaux Three bridges in the valley of dreams |
 | | In 1901, the tourbillon under three bridges was declared ineligible during the Paris world exhibitions because it could not be equalled. |
 | | The base is nickel with patented three parallel gold bridges, pillar plate and mainspring barrel being finely finished on both sides, 18 jewels with bridge side gold settings, gold train including the escape wheel, 21,600 beats per hour, cut bimetallic compensation balance, blued steel Breguet balance spring with amplitude safety device. |
 | | The movement measures 31.9 mm, nickel with gold bridges, pillar plate and main barrel finely finished, golden wheels, 19 jewels with the bridge side jewels in gold settings, "Guinand-2" type tourbillon cage with pivoted detent escapement, 21,600 frequency, cut bimetallic compensation balance, blued steel Breguet balance spring with amplitude safety device. |
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