Longines Replica Watches has introduced the first altimeter-equipped automatic mechanical wristwatch in the world. The Big Crown ProPilot Altimeter was developed in-house at the Holstein factory as a high performance tool for pilots and mountaineers. It is also a great tool for adventurers, researchers, scientists, and other explorers who work in altitude.

You may have heard the phrase "the first automatic mechanical altimeter" before. Breva Genie 02 Watch, the world's first mechanical wristwatch featuring an altimeter is not an automatic watch. It is hand-wound.

Longines Replica Watches mechanical caliber 733 is the timekeeping component of the watch. It is based on Swiss Sellita SW200 and sits on top of a module in the middle case. The movement beats at a rate of 28,800 vibrations an hour (4 Hz), and has no less than a 38-hour power reserve.

The movement is located in a bowl and is surrounded by an altimeter scale and barometer. It rests on top of the space reserved for the capsule system. The Swiss barometric movement is an integrated mechanical altimeter-barometer that was developed in collaboration with Thommen. The stem of the mechanism extends up to the crown in the 2 o’clock position. This allows the wearer wind the ProPilot Altimeter's timekeeping function (Vacheron Constantin Replica) or to set it.

A second screw-down cap is located at 4 o'clock to adjust the altimeter, whose scale appears around the outer dial circle. The altimeter measures horizontal and vertical angles above a fixed height. However, before the system can show the correct height the wearer must calibrate and adjust the system.

To allow air into the case, you must first unscrew it at 4 o'clock. You might expect that the case will not be water-proof when unscrewed. The red ring around the crown at 4 o'clock is only visible when the crown has been unscrewed. It is there to alert the wearer of the fact that the watch at that time is not waterproof. The venting crown allows water to enter the watch case but prevents moisture by creating a vapor barrier using a PTFE ring.(www.omegaimitation.com)