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The Breguet Classique Tourbillon Extra-Plat Automatique 5367 in a “Grand Feu” enamel version. It measures a mere 7.45 mm thick and its movement just 3 mm. Calibre 581 powering this timepiece comprises a balance oscillating at a frequency of 4 Hz while mai

by swisswatches · 8 years ago · via Instagram

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