Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides
Steel
Black
300 m (1000 feet)
GentsCase Diameter: 41 mm
The calibre 2507 has a bullet decoration on the rotor that rotates with the motion of the oscillating weight. Self-winding chronometer, Co-Axial escapement-equipped movement with rhodium-plated finish.
Power reserve: 48 hours