空气钟, Caliber 519 - Jaeger-LeCoultre - 黄铜, 玻璃, 铬 - 1950-1960

这是 Atmos。它完全靠空气而运转。
Jaeger LeCoultre Atmos perpetual motion clock, caliber 519, greenish-blue dial, serial number 34523, made in 1951. → 这是积家 Atmos 永动钟，机芯519，青蓝色表盘，序列号34523，产于1951年。
Good running condition, keeps accurate time (+/-5min.per week), movement is in good condition, recently cleaned, bellows inspected, works good. → 运行良好，走时准确（每周误差±5分钟），机芯状态良好，最近已清洁，风箱检查完好，工作正常。
The case is refurbished, chrome plated, in good condition. → 表壳已翻新，镀铬，状况良好。
See pictures and videos for more details https://youtube.com/shorts/tbeVadBgsdw . → 更多细节请参阅图片和视频 https://youtube.com/shorts/tbeVadBgsdw 。
Secure shipping using double boxed packing. → 采用双层箱包装，确保运输安全。
Jaeger-Le Coultre's famous 'Atmos' clock was first developed in 1928. → 积家著名的 Atmos 钟最初开发于1928年。
The clock is automatically wound without any intervention by the owner. → 该钟自动上链，无需主人干预。
Changes in air temperature makes winding the clock's mainspring. → 气温变化会为主发条上弦。
A change in temperature of one degree can provide enough power to run the clock for few days, and the mainspring has enough power in reserve to run the clock for a year. → 温度每升高或下降一度就能为钟提供足够的能量，主发条有足够的储备，足以让钟运转数日甚至一年。
Energy is conserved by the very slow-moving twisting pendulum which 'beats' only twice per minute. → 能量通过极缓慢摆动的扭转摆来维持，它每分钟只跳动两次。
"JLC ATMOS clock is one of the world’s most innovative clocks, the Jaeger-LeCoultre Atmos is a visionary technical masterpiece. Powered by atmospheric pressure and temperature changes, it’s essentially a perpetual motion device, allowing it to run for years without human intervention. The Atmos is such a ground-breaking creation that it’s chosen as a traditional gift to heads of state and dignitaries". → JLC ATMOS钟是世界上最具创新性的钟之一，积家 Atmos 是一项具有前瞻性的技术杰作。靠大气压强和温度变化供能，本质上是一台永久运动装置，让它在多年内无需人为干预就能运转。Atmos 的创新成就如此突破，以至于被选为送给国家元首和贵宾的传统礼物。
The movement is very silent. → 机芯运转非常安静。
Warning!!! These clocks can have troubles to wind in premises with high quality climate control systems (where air temperature is very stable). → 警告！！！在气候控制条件良好（空气温度非常稳定）的场所，这些钟可能上弦困难。
The clock must not be moved without locking the pendulum - moving the lever at the base bottom from the left to the right. → 在不锁定摆锤的情况下不得移动钟表——从底部左侧向右侧移动底座的杠杆。
To change the time, the minute hand must be moved by turning it clockwise. → 要调整时间，请顺时针转动分针。