Seiko Speed Timer Bullhead Chronograph Ref.6138-0040 Automatic Cal. 6138B
Manufacturer: Seiko; Model: Bullhead Speed Timer; Country: Japan; Type: Man's;
Ref. 6138-0040; Cal. 6138B ; Circa Date:1970s
The Seiko Bullhead 6138-0040 was introduced in 1969 as part of the “Seiko 5”
family. According to Seiko’s official website, the “5 Sports” line came to be
known as such because of five defining traits. These attributes are automatic
winding, day/date displayed in a single window, water resistance, recessed crown
at the 4 o’clock position, and a durable case and bracelet. Condensed into
affordable, high-performance watches, they came in different guises aimed at a
younger generation with very active lifestyles.
Material: Stainless Steel.
Back: Screw Back.
Measurements: The width 43.5mm without a crown.
(The case is in Very Good condition)
Type: Bracelet Style with Deployment Buckle.
Color: Root Beer.
Numerals: Non-Numeric Markers.
Tracks: 1/5 Seconds Track.
Hands: Baton Hands.
Registers: 30-Minute Register, 60-Minute Register, 12-Hour Register, Date
Window, Day Window.
D 2 (The dial is in Perfect condition)
Type: Mechanical, Automatic Wind Movement.
Jewels: 21 Jewels.
Escapement: Lever Escapement.
Set: Stem Set.
Signed: Cal. 6138 B
(The movement is in Very Good condition)