Vintage Basis Sport with a very attractive mid-century “instrument” dial and an uncommon Start/Stop timer function operated by two pushers (top pusher starts, bottom pusher stops the central seconds hand).  The dial features a rangefinder / telemeter scale (KM) and multiple calibrated tracks, making it a great collector’s piece with real 1950s tool-watch character.  Highlights • Brand / Model: Basis Sport “Start/Stop” timer • Era: circa 1950s  • Movement: Swiss mechanical manual-wind (visible in photos) • Dial: “Basis Sport”, Antimagnetique, multi-scale with rangefinder/telemeter  • Case: Gold plated  • Caseback / inner cover: inner dust cover marked CT 18750 (as pictured) • Size: approx. 38 mm without crown / 40 mm with crown  • Crystal: acrylic (shows age-related marks) • Strap: leather strap (aftermarket) Condition Honest vintage condition with visible wear on the case and crystal, consistent with age. Dial shows natural patina/aging that suits the watch very well. Please review the pictures carefully. Important notes Due to its age, water resistance is not guaranteed (please treat as non-waterproof).  No service history available; future maintenance may be required on any vintage mechanical watch. Included: watch as shown.