This is a Swiss military watch made around 1950, over seventy years ago. The screw-down case back provides water and dust resistance. It features Arabic numerals, and the second hand is painted red for enhanced visibility. The hands and indices are coated with radium paint, making them easy to see in the dark. The movement is equipped with a shock absorber, providing the impact resistance necessary for a military watch. The "Precimax" by Helvetia (this item) is a masterpiece, equipped with the special gear train movement "Caliber 450," which maximizes the performance of a high-jewel watch (17 jewels). Case diameter: 32.0 millimeters Crystal diameter: 27.0 millimeters Lug width or band width (the width of the band where it attaches to the watch): 16 millimeters It runs, but sometimes stops. Tapping it with a fingertip will make it start again. Daily accuracy is unknown. An overhaul is required for proper use. It was sold for around 120,000 yen at antique watch stores. It is being offered at a lower price due to the need for an overhaul.