Girard-Perregaux Minute Repeater Tourbillon with Bridges

The Girard-Perregaux Minute Repeater Tourbillon with Bridges, reference 99820-21-001-BA6A, has a 45 mm titanium case measuring 15.91 mm thick. A minute repeater and a tourbillon are visible on the dial side alongside the gongs and hammers. Manual-winding calibre GP09500-0003 has 37 jewels and runs at 21,600 vibrations per hour (3 Hz), with a power reserve of 58 hours. Sapphire front glass and a sapphire display back reveal the construction. A black alligator leather strap has a titanium triple folding clasp, and the case is rated to 30 metres. Production is limited to 30 pieces.