Seiko 6139-600x–part ii – elusive silver PROOF/PROOF
Following on from the previous tale of the 6139 as produced by Seiko in 1969, here’s a rare and interesting…
Seiko 6139-600x–part i – as worn by Francois Cevert & Nick Mason
50 years ago, Seiko was quietly producing what could arguably be the world’s first automatic chronograph. Other manufacturers were trying…