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MATERIAL:
complete sapphire crystal (3 parts: case center, domed crystal, caseback) with Double Anti-Reflective Treatment
MOVEMENT CALIBER:
Manufacture Jacob & Co. Manual Winding JCAM12
FINISHING:
Plate and Bridges: Hand Angled and Polished, Flank Draw, Circular Graining, Polished Sink, One Sapphire Bridge; Polished Screws; Barrel: Circular Graining; Pinions: Conical Pinions; 4 Mechanical Ball Bearing Devices; Flat Balance Spring.