Lings 21 Prix chronostop vintage men's wristwatch with mechanical hand winding and Swiss movement. A "chronostop" is NOT a chronograph because there is no automatic reset to 0 (unless you set all the hands to 12 o'clock yourself). Model mainly used by doctors to monitor the duration of operations. Beautiful original piece for collectors and enthusiasts. Important to mention: - Some light scratches on the back of the lid. - Not water resistant. - The 2 pushers are perfectly functional: The top stops the seconds hand and the movement, the bottom restarts them. - The movement must be rewind every day, but be careful not to overdo this. - The dial has a small hand that rotates with the hour hand. - A chronostop is different from a chronograph: No automatic reset. - The OC cal 120 trademark is engraved on the back of the lid. Brand: LINGS Year of production: 1967 Condition: signs of use on the watch Functions: hours, minutes, small seconds & chronostop. Country: France Diameter: 37mm Case: Gold Plated Bracelet: Gold Plated 25cm Weight: 78g Photos are part of the description. Insured and secured shipping.