The ecological technology of the future : a quartz movement which rewinds automatically so does not need a battery. The energy is generated by the movement of the wrist and the system can be activated with the crown. Maximum power-reserve of 6 days. With a screw-down crown and back, unidirectional rotating bezel, tritium-coated skeleton hands and sapphire crystal with magnifying glass, the new stainless steel Searnaster is water-resistant to 200 m.