Seiko “Bullhead” Automatic Chronograph

A typical Seiko, the Bullhead is definitely not.  This is the red (brown, maybe?) headed stepchild of the Seiko stable. Largely ignored and sidelined by its more conventionally designed siblings, the 6138-0060T still has some details to make you turn your head.

Photography by Ronald Chew

by The Balance Coq

  • August 15, 2023

The Seiko “Bullhead” Automatic Chronograph Ref. 6138-0060T stands as a testament to Seiko’s ingenuity, fusing mechanical prowess with a distinctive design that echoes both functionality and aesthetic allure. This timepiece is a harmonious blend of innovation and artistry, catering to watch collectors seeking a remarkable and evocative wrist companion.

At the heart of the Ref. 6138-0060T resides the esteemed Caliber 6138 automatic movement—a masterpiece of engineering that encapsulates Seiko’s dedication to precision. With 21 jewels and a frequency of 21,600 vibrations per hour, this movement ensures a consistent and accurate measure of time. The vertical clutch system orchestrates the chronograph function, enabling seamless initiation and cessation with minimal hesitation. This not only enhances timekeeping precision but also prolongs the movement’s longevity.

The design is a marriage of form and function, exemplified by the distinctive “Bullhead” nomenclature, aptly describing the crown and pusher placement reminiscent of a bull’s horns. This unique arrangement, while visually striking, serves a practical purpose by affording ergonomic ease during operation. The upper pusher activates the chronograph, while the lower pusher resets it—a thoughtful design element that guards against accidental resets.

The dial exudes a sense of purposeful organization, with contrasting sub-dials for the 30-minute and 12-hour counters, ensuring swift and accurate elapsed time reading. The day and date aperture provides a functional dimension, catering to the demands of daily wear. Encircling the dial is a tachymeter scale, offering utility to racing enthusiasts for speed calculations—a testament to the watch’s versatility.

Crafted from stainless steel, the case exhibits both robustness and refinement, measuring 43mm in diameter and 15mm in thickness. The angular contours and layered construction lend the timepiece an imposing yet harmonious presence. The bracelet, fashioned from the same enduring material, mirrors this balance while upholding comfort.

Noteworthy is the injection of character through design nuances. A vibrant red accentuates the chronograph seconds hand, adding a dynamic touch to the ensemble. Luminescent markers and hands assure readability under varied lighting conditions, an indispensable attribute for a chronograph designed with action in mind.

The Seiko “Bullhead” Ref. 6138-0060T Automatic Chronograph transcends the realm of timekeeping, embodying the spirit of Seiko’s innovation. Its masterful movement, ergonomic layout, and durable construction converge to create an unforgettable horological experience. For aficionados seeking a blend of technical excellence and aesthetic distinction, this timepiece emerges as an irresistible choice—a harmonious symphony of art and engineering on the wrist.


ModelBullhead Automatic Chronograph
Case MaterialStainless Steel
Case Dimensions43.5mm x 45mm
Case Height15.3mm
Water Resistance100m
Lug Width20mm
MovementSeiko, self-winding, caliber 6138
WearsTrue to size

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