Repair and service: Citizen Diamond flake calibre 0.700

Diamond FlakeAfter selling my lovely Diamond flake before realising what a great movement it has, I could not resist buying another one when it showed up…. This watch was bought on ebay as a non-running watch with a terrible photo. So seeing that lovely dial made me want to service the watch straight away.

IMG_9281At first sight the movement looks very nice.IMG_9285Removing the canon pinion I discover a small disaster zone. A previous watchmaker has tried to fit a new bush for the centre wheel pinion and has used too much force damaging the base plate.IMG_9286I decide to continue on the watch, as these movements are getting hard to find and I think it deserves to be fixed.IMG_9287The old mainspring.IMG_9292Here you can see the top side of the old repair.IMG_9293I start by removing the old bush and then broaching the hole to size so I can fit a new one. The trick is to hit the centre as the old hole is oval.IMG_9295The old repair has already deformed the plate and made it impossible to fit a new jewel. Therefore I have soldered a new bush in place and then machined it to the correct height. I decide on soldering as I do not need to apply any force when fitting the bush. It does not look as pretty as a jewel would, but will do the job.IMG_9299I clean all the parts and start reassembling the movement. IMG_9300The new mainspring.IMG_9301The movement is almost back together and I’m happy to have a free running gear train.IMG_9303Here you can see the setting mechanism before fitting the dial, unfortunately this watch has a broken setting lever spring. If any one has a spare one, please let me know!Citizen calibre 0.700Here you can see the movement back in the case.IMG_9302Proof of the repair is in the performance 😉Citizen Diamond FlakeAnother great looking Diamond Flake ticking like it should.Citizen Diamond FlakeJust love the two toned dial in the sunlight 😉

9 thoughts on “Repair and service: Citizen Diamond flake calibre 0.700

  1. Very nice watch and work Mitka. I have a question if you don´t mind my asking: What type of power reserve do this very thin movements hold? Is it around 40+ hours or much less?

  2. Good to see that you managed to find a Diamond Flake. A stainless steel version is not easy to find, and I must admit I am a bit jealous as I am a sucker for stainless!

    For the broken setting lever I will try to work my magic again, but I don’t promise anything. I hope I can indeed do the “double” and get you the part so you can complete your elegant Citizen.

    For the lever, you could try contacting Stephen from, most probably the definitive Citizen guru. He helped me out last time.

    Beautiful watch indeed! Perhaps something you could pass on to your daughter one day. Enjoy!

    • Hi Panos,

      Thanks for the help:) I do not own the watch anymore as it was a gift to my father in law who was born the same year the watch was made:) He will wear it when traveling to Japan on business trips.

  3. Excellent work, as always!
    Great to see that there is still little undervalued marvels to be found out there.
    The early 1960s was obviously good for Japanese engineering!

  4. Nice work! The best stories are always the ones with the unforeseen challenge and I do enjoy seeing the solutions you and Christian come up with. Interesting that this piece also has a broken setting lever though- must be the Achilles’ heel of this model.

    Quite a lovely watch too. I have to admit looking them over on eBay after your last post- probably will end up there again after this one!

  5. Spot on, Mitka! If you would have pressed the bush in in the usual way, the plate would have broken, so soft soldering the bush into the plate is the right thing to do. Very good repair!

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