1. Mechanical stopwatch "Agat" (model SOPpr-2a-2-010), manufactured at the Zlatoust Watch Factory. This is a classic one-button device of simple action, designed for accurate measurement of time intervals. Main characteristics and functionality: Mechanism: Caliber 42 mm on 15 rubies with anchor mechanism. Scales: Main 60-second scale with a division value of 0.2 s. Small 30-minute scale (counter) with a division value of 1 min. Control: Carried out by one crown. Successive presses perform the functions of starting, stopping and returning the hands to zero. Features: The model is equipped with shock-proof balance protection, which increases the reliability of the mechanism. The case is made of chrome-plated metal. Such stopwatches are widely used in sports, scientific research, and laboratory timing. 2. A genuine Soviet mechanical stopwatch "Agat" of the Zlatoustiv watch factory. Class 2 accuracy, a wide range of operating temperatures and a chrome-plated body made of durable metal. Agate the stopwatch is designed to measure time in short seconds and fractions of a second; It is used in direct sunlight, as well as in scientific research and when determining the time range. The stopwatch meets all the requirements for measuring devices; In addition, you will definitely be pleased with the compact size of this device and convenient scales. The duration of operation with a fully wound clock spring is at least 18 hours.