Up for sale is a legendary piece of horological history: the Citizen 67-9019, famously known as the "Bullhead" or "Challenge Timer." This watch earned its nickname due to the unique placement of the crown and pushers at the 12 o'clock position. Movement: Powered by the high-beat Caliber 8110A automatic movement (23 Jewels, 28,800 bph). Flyback Function: Features the sophisticated "Flyback" chronograph complication, allowing an instant reset and restart with a single push. Condition: The dial and hands are in excellent vintage condition. The movement is clean (as shown in photos) and keeps good time for a vintage timepiece. Case & Bracelet: Original stainless steel case paired with a Citizen-signed steel bracelet. Calendar: Quick-set day (bilingual) and date functions are fully operational. Collector's Note: A must-have for vintage chronograph enthusiasts. This model is becoming increasingly difficult to find in such clean mechanical condition.