1976 Seiko SpeedTimer Chronograph (Ref. 6138-0040) "Bullhead"

This is the classic 6138-0049 Seiko Bullhead chronograph. Seiko started producing this timepiece in 1975 and concluded the production in 1978. The 6138 line of Seiko's are highly collectible for two reasons; the Seiko designed 6138B movement is very precise and highly accurate, and they are a blast back into the iconic design trends of the 1970s. The name Bullhead comes from the unique ergonomic shape of the case that features an asymmetrical thickness, being thicker at the top and slimmer at the bottom. Rather than having the crown and chronograph pushers on the right side of the case, like traditional chronographs, the movement has been rotated so the crown and pushers are at the top of the case, at the 12 o'clock position, giving the chronograph pushers a resemblance to the horns of a bull. The theory behind this unique design is you’re less likely to engage or disengage the chronograph with the pushers at the top, as opposed to the side. The design of the Seiko Bullhead was built around the active sporting lifestyle.

The Seiko Bullhead came in two dial variants; a copper dial with gold subdials and a black dial with light blue subdials. Brown bullheads also come in additional SpeedTimer variants. SpeedTimer Bullhead variants were produced for the Japanese Domestic Market and were sold exclusively in Japan and surrounding areas. The Bullheads produced for the rest of the world wore the standard "Chronograph Automatic" markings.

Stock # SKOSTCH61380040
Brand Seiko
Style SpeedTimer "Bullhead" Chronograph
Model 6138-0040
Serial 65XXXX
Size Men's
Material Stainless Steel
Dial Brown "Ombre"
Millimeters 43.5
Bracelet 2pc Handmade Leather Strap



The unpolished asymmetrical case is exceptional, retaining strong factory brushing and crisp lines with light signs of use. The amber tachymeter bezel is in excellent condition showing almost no signs of use and no fading. The bullhead crown and pushers are original to the watch. The case back retains all of its factory engravings in crisp and deep condition. The watch will come supplied on a 2pc handmade leather strap.


The brown "ombre" dial is lighter in the center and gradually becomes darker towards the minute track, and features a metallic gold window around the date and sub-dials. The non-luminous dial is in flawless original condition, showing no signs of age or damage. The original hands are in flawless original condition as well. 


None. The watch is keeping time and functioning perfectly, previous service history is unknown.