6138

To be clear, Rolex never used the 7750 in their Daytonas. They used their modified version of the Valjoux 72. The 7750 was used in some Tudor chronographs, but never Rolex. Also, the 6138's are amazing watches! I own this exact model, and another version

Paired with it's original 19MM straight end link SEIKO branded Stelux President bracelet. Introduced in 1970 and produced until approximately 1979. Part of Seiko’s pioneering generation of integrated chronograph movements to feature a column wheel and ver

The 6138 was my second watch I had. I still love it, timeless design, fantastic movement. A real workhorse, can take any beating. Wore it daily throughout college, med school and residency. Still have it and love it, though gets much less wrist time. Dene

SEIKO 6138-0011

Caliber 6138 movement: automatic chronograph with vertical clutch and column wheel. circa: 1971 March paired with: SEIKO branded STELUX Presidential SS bracelet

The 6138 was my faithful companion from second year in med. school in 1976 until the late eighty's, when it just stopped working. Then I bought a Seiko quartz. My only quartz I ever had. I still have the 6138 in my collection, after 20 years being broken

SEIKO 6138-0011 Yachtsman [aka UFO] circa: 1971 Seiko SKX009J - Automatic Diver's 200m Made in Japan

The 21 jewel Seiko 6138A was first released in 1969, and was the first fully integrated two-register automatic chronograph with a column wheel and vertical clutch and 21600 bph. I purchased this last Christmas Eve “Eve” 12-23-23 while browsing

SEIKO 6138-0011 YACHTsMAN circa: 1971