Here is another Seiko Chrono a 6139-6010 from 1969 and a proof caseback version making this the first year of production of Seikos first automatic chronograph watch! I bought this in 2019 after a tip off from a friend that this was on eBay going cheap but needed a lot of work. I bought it and on stripdown found the watch to be absolutely full of oil hence why it was not running. It was also missing the red chrono hand. The Facebook group came to the rescue and a member from the USA kindly donated me a hand, I just had to paint it. The rebuild of the movement was a pleasure and all went well. I can only assume all that oil kept it preserved for all these years. I really struggled with the fitting of the chrono hand though in part because it was from another watch so it did not want to sit at 12 but at 11.58… This is due to the staff it sits on being square and the hand tube round. The staff keys into the round tube to secure it so on fly back of chono the force when coming to a stop keeps the hand in the same place. After broaching the tube slightly and many attempts I finally have got it centred. I absolutely love this watch its a real beauty and still going strong despite being 50 years old!
