Girard-Perregaux Minute Repeater Tourbillon with Bridges

The Girard-Perregaux Minute Repeater Tourbillon with Bridges, reference 99820-52-001-BA6A, has a pink gold case measuring 45 mm across and 15.91 mm thick. A minute repeater and a tourbillon share the dial side with visible gongs and hammers. Manual-winding calibre GP09500-1103 contains 37 jewels and has a power reserve of 58 hours. The movement operates at 21,600 vibrations per hour (3 Hz). Sapphire front glass and a sapphire display back reveal the construction. A black alligator leather strap has a pink gold triple folding clasp, while the case carries a water-resistance rating of 30 metres.