Girard-Perregaux Minute Repeater Tourbillon with Bridges

The Girard-Perregaux Minute Repeater Tourbillon with Bridges, reference 99820-53-002-BA6A, has a 45 mm white gold case, 15.91 mm thick. A minute repeater and a tourbillon are visible beneath sapphire front glass, alongside the gongs and hammers. Manual-winding calibre GP09500-0005 contains 37 jewels and runs at 21,600 vibrations per hour (3 Hz), with a power reserve of 58 hours. A black alligator leather strap has a white gold triple folding clasp. The case is rated to 30 metres and has a sapphire display back. Production is limited to 30 pieces.