Diving features include: a unidirectional rotational divers bezel with a ceramic insert and elapsed dive-time scale, a manually operated helium escape valve (10 o'clock), screw-down: caseback crown and chrono pushers, a Sapphire crystal with AR-coating and 300M of water-resistance.
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The of the Argonautic Lumis boasts Tritium gas tubes on its hands and dial and is powered by a Swiss made ETA Valjoux 7750 self-winding chronograph caliber.
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Also check out the new 500m water-resistant, TERNOS Professional diver from Davosa . . .
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