Tissot Navigator Automatic Chronograph - EXTREMELY RARE - Ref. 45.500 - Vintage 1970s - Valjoux 7750 Description: Overview: A true vintage Tissot Navigator automatic chronograph, an iconic piece representing the bold "tool-watch" design of the 1970s. This is an extremely rare timepiece that seldom appears on the market, making it a high-priority find for serious Tissot and vintage chronograph collectors. Condition & Technical Details (Please read carefully): Case (Front and Sides): In excellent condition, retaining its original sharp lines and factory finishes. The visible parts of the watch while worn are exceptionally clean. Case Back: Shows signs of wear and handling marks consistent with age. These cosmetic markings are located exclusively on the steel case back and do not affect the integrity, water resistance (not guaranteed), or functionality of the watch. Movement: High-grade Automatic Chronograph, Caliber Valjoux 7750 (signed Tissot on the rotor). The chronograph functions (start/stop/reset) are fully operational. As the service history is unknown, the watch is sold with a recommendation for a professional service to ensure long-term precision. Dial & Hands: Original black dial in superb aesthetic condition. All hands are original to the model. Strap: Fitted with a black leather strap that shows signs of wear and requires replacement. The watch is sold exactly as shown in the photographs. Important Information for Bidders: Rare collector's item—an unusual opportunity in the auction market. The lot includes the WATCH ONLY. NO hang-tag, NO original box, and NO original documents included. The item is sold "as is." Please study the high-resolution photo gallery carefully, including the images of the open movement and the inner case back (where reference 45.500 is engraved), to confirm the configuration and condition.