Longines 30CH Flyback Chronograph (1969) A rare vintage Swiss manual-wind chronograph from the late 1960s, powered by Longines' iconic in-house Cal. 30CH column-wheel, horizontal-clutch flyback movement (featuring Breguet hairspring and single-metal screw balance). Flyback Function: Allows instant reset/restart of timing without stopping the hand first. Case Material: Stainless steel (good condition with light scratches, minor dings, and subtle oxidation). Dimensions: 43.3mm x 41mm (excluding crown), 22mm lug width. Crystal: Mineral glass (good condition). Crown: Functional, no logo. Dial & Hands: Panda Dial: Black & white design (good condition with slight oxidation discoloration). Lume: Applied indices and hands (mild oxidation consistent with age).