1940s Tissot Rare "Mediostat" Stop-Second Gray & Blue Two-Tone Dial in 33mm Water-resistant

Tissot, rare "Mediostat", stop-second, water-resistant, 33 mm diameter dial, two-tone gray & blue dial, circa 1940s. It is equipped with Cal.M27, which is based on the small second Cal.27 found in the 3-hand models, with the addition of a 60-second totalizer and stop-second function. It is equipped with a stop-second function that stops the 60-second totalizer when the button is pressed halfway, and a simple flyback function that returns to the 12 o'clock position when the button is pressed and instantly starts the movement. It is a simple chronograph model that can measure up to 12 hours by operating the watch with the hands at exactly zero. The dial is a two-tone design with a gray base color, minute track and small seconds track in rare blue, and the distinctive logo in silver lettering. The screw back case is engraved to indicate earthquake resistance and water resistance, making it a high-grade, boy's size watch. The back of the watch is engraved.