The Seiko 6138-0040, famously known as the "Bullhead," is a prominent 1970s automatic chronograph. It is easily identified by its "bullhead" configuration, where the crown and chronograph pushers are located at the top of the case (12 o'clock) rather than the side, a design intended to prevent accidental activation and improve ergonomics for racing drivers.
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About the Brand
Seiko: A beloved brand among collectors, Seiko has long been known for offering exceptional watches at accessible prices. Founded in 1881, the Japanese brand earned worldwide recognition for its divers, sports chronographs, and industry-leading quartz technology. With a lineup that includes historically significant and technically innovative pieces, Seiko remains one of the most widely collected and respected watch brands across all price points.