Service: Omega 300 calibre 565

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A client has sent in his lovely Omega 300 case ref: 166024 – 67 SC It’s in need of a service. 

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Movement looks to be in decent condition.

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Watch is running, but loosing a lot of time.

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Here you can see the inside of the autowinder mechanism.

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The screw head for the rotor Gib broke, but luckily I managed to wiggle out the screw.

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Here you can see the date changing mechanism for the 565.

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Here you can see the setting/winding mechanism. You can also see the long thin post from the second hand pinion protruding though the centre wheel.

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Here you can see the gear train layout of the 550 series with the bridge removed.

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Old mainspring.

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All the parts cleaned and ready to be put back together.

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New mainspring in the cleaned barrel.

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Here I see that the balance moves freely after fitting the cap jewels.

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Gear train back together.

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Base movement almost back together.

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Base movement back together and ticking. I like the micro regulator you find on these Omega movements.

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Watch is performing very well.

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Dial and hands goes back on the movement.

Omega Seamaster 300 movement

Movement back in the case looking good!

Omega Seamaster 300

Nice looking classic.

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3 Responses to Service: Omega 300 calibre 565

  1. Brandon says:

    Do you have any tricks for installing new mainsprings, particularly the new ones that come wound in a sleeve or washer? What I have done for years is, while holding the sleeve I use a screwdriver and slowly press along the outside of the mainspring pushing it into the barrel. I feel like there is a better way, but anything else I have tried, has resulted in a mainspring that doesn’t completely go into a barrel, with an outer coil sticking out. Any advice is greatly appreciated!

    Brandon

    Like

    • mitka88 says:

      Hi Brandon,

      I find no flaw in your technique:)

      I find that the sleeve for the 550 series is never small enough for the barrel, causing the outer wind not going into the barrel (like you mentioned) So I unwind the mainspring out of the sleeve and then wind the mainspring manually into the barrel. I use powder free nitride gloves when handling the mainspring. When the sleeve is small enough for the mainspring to be pushed straight into the barrel I press it in with a plastic stick. One can also use mainspring winders, but I never quite took to them.

      Like

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