The Bulgari Serpenti Misteriosi High Jewelry "Secret" Watches Four referencesMovements Mechanical manual winding micro-movement BVL 100 Piccolissimo
link calibre 12.30 mm in diameter 2.50 mm thick 1.30 gr in weight 21 jewels
link 102 components 21600 VpH 30-hour power
link reserve crown on the caseback bi-directional for time-setting and winding.