Jaeger-LeCoultre ATMOS Atmos Clock ※(Please read to the end) I understand this clock runs on changes in air or atmospheric pressure. It's a special clock that doesn't need to be wound or have its battery replaced... ※This is a world-renowned clock, also known as a perpetual clock or air clock... Width: Approximately 21 cm, Depth: Approximately 16 cm, Height: Approximately 23.5 cm ※Please note that there may be slight discrepancies due to amateur measurements... I heard it was from the 1970s to 80s, but the actual date is unknown... ※Place it on a stable, flat surface and release the lock. The rotating pendulum will start to move, and the hands will begin to move... To set the time, turn the minute hand clockwise to adjust the time... I have not had it overhauled or maintained, but it is still running... ※It does not have the same accuracy as modern clocks, which seems to be the case for all of these products... Occasionally, it may stop due to vibrations, changes in air pressure, or temperature fluctuations, but it will start again if you gently move the pendulum... It will be delivered as is, so please feel free to ask any questions if you are considering purchasing... ※As shown in the images, there are scratches, stains, and metal corrosion. Please understand this before purchasing (as it is an old item). I received it from a friend's home, and it came into my possession around 1988... It has been running until now... ※Currently, it is about 2 minutes slow per day. There seems to be a way to adjust it, but I haven't touched it because I'm afraid of breaking it... To advance the hands, stop the clock and gently move the minute hand with a cotton swab. Please note that this clock does not have a dial like a regular clock. As this is a used item, please make your judgment based on the images and purchase it if you understand. I will pack it carefully and ship it. (Request) ※I do not offer dedicated support※ Please read my profile and leave a comment... (Regarding the shipping period, I may ship it earlier than the listed period)