Project · ref 100023
Seiko 6139-6012 "Bruce Lee"
Seiko · 6139-6012 · 1977-08
About this model
The 6139 was one of the first automatic chronographs, launched in 1969, the same year as Zenith's El Primero and the Chronomatic Calibre 11. Which of the three was genuinely first is still argued. The blue-dial 6139-6012 carries its nickname because Bruce Lee wore one in the last years of his life, and he can be seen with it in archive photographs from the period.
Not been through yet
I have not had this one on the bench, so there is nothing written down. Ask and I will take a proper look and tell you what I find before you decide anything.