A 3-pointer <a href="https://en.wikipedia.org/wiki/pressure_altimeter" class="extiw" title="wikipedia:pressure altimeter">Wikipedia:pressure altimeter</a>. The small hand is in thousands of feet, the larger hand is in hundreds of feet and the long thin hand is in tens of thousands of feet. The dial on the right side displays the set ground atmospheric pressure, which can be adjusted with the knob on the bottom left. Thus, this altimeter is displaying an altitude of 10,180 feet with a ground pressure of 29.92 <a href="https://en.wikipedia.org/wiki/inHg" class="extiw" title="wikipedia:inHg">inHg</a>. The stripes at the bottom are fully concealed at 15,000 feet and above and fully visible at 10,000 feet and below. At 10,180 feet, only 3% of them are hidden.
<a href="https://en.wikipedia.org/wiki/User:Bsayusd" class="extiw" title="wikipedia:User:Bsayusd">Bsayusd</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
11 July 2007 (original upload date)
Based on an image by the federal government in the public domain. Originally from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>; description page is/was <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Image%3A3-Pointer_Altimeter.svg">here</a>.