903 H4

The navigation chronograph with hand-wound movement and moon phase.

Special characteristics
  • Case made of stainless steel, polished / satinized
  • Lemania 1883 mechanical hand-wound movement
  • Moon phase display
  • Hand date
  • Interior bezel with logarithmic scale and slide rule function
  • Sapphire crystal glass
  • Transparent case back made of sapphire crystal glass
  • Charcoal grey electroplated dial, UV resistant
  • Pressure-resistant to 10 bar
  • Low pressure resistant


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