
These watches measure just 23 millimeters across. They’re not called the smallest in the world — they’re the most compact.
At 23 millimeters in diameter, they pack two dials. One dial shows the hours, minutes, months, and days, while the second lets you read the exact time in 125 cities around the globe at a glance. That second dial also carries indicators for atmospheric pressure, temperature, and humidity. And by looking at this feat of craftsmanship, you can even determine altitude above sea level with surprising precision.
But some experts might object: there are watches with a smaller diameter — for example, the Zarya. Still, these timepieces are classified not as the smallest but as the most compact in the world.
Measuring 23 millimeters, the pair of dials deliver comprehensive information: local time and calendar on one dial, global time and environmental data on the other, including barometric pressure, temperature, humidity, and altitude.