Reine de Naples 9807

Case in steel, cambered ovoid with a delicately fluted case band. Sapphire-crystal case back. Dimensions 32.7 x 27.3mm. Water resistant to 3 bar (30m). Dial in grained natural white mother-of-pearl. Off-centre chapter ring at 6 o’clock with Roman numerals in white natural mother-of-pearl marquetry. Self-winding movement. Cal. 586/1. 38 hours power reserve. In-line Swiss lever escapement. Breguet balance on a silicon spring. Balance frequency 3Hz.

Movement
Winding: Self-winding
Power reserve (hours): 38
Calibre: 586/1
Lines: 6¾
Jewels: 29
Frequency: 3
Balance-wheel: Breguet
Escapement: Inverted straight-line lever
Balance-spring: Flat / Silicon

Case
Metal: Steel
Skeleton: No
Sapphire caseback: Yes
Case shape: Oblong
Case height (mm): 32.7
Case width (mm): 27.3
Case thickness (mm): 10.02
Water-resistant (m): 30

Reference
9807ST/5W/922