Speed-Timer Bullhead
Automatic chronograph, Japan 1976. Original dial, unpolished case, serviced 2025.
A distinctive and innovative chronograph from Seiko’s golden era. The 6138-0040, nicknamed the “Bullhead” for its top-mounted pushers, represents Seiko’s pioneering spirit in the 1970s - a functional, unconventional and highly collectible design.
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The Seiko 6138-0040, better known as the Bullhead, was introduced in the mid-1970s as part of Seiko’s advanced chronograph lineup. Its most distinctive feature is the placement of the crown and pushers at the 12 o’clock position — a design choice that improved ergonomics and gave the watch a bold, unconventional look.
Powered by the 6138 automatic chronograph movement, the Bullhead offered column wheel operation and day-date functionality, placing it among the most advanced chronographs of its time. Today, it is highly regarded by collectors for its distinctive design, robustness and importance in Seiko’s history.
A true expression of Seiko’s innovative spirit, the 6138-0040 remains a compelling choice for anyone interested in JDM chronographs and the golden era of Japanese watchmaking.
Found there. Collected here.
Japan's watchmaking history extends far beyond the familiar names and celebrated references. We search across Japan for watches with character, history and a reason to be collected—from recognized classics to remarkable pieces that have been overlooked along the way.
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