Service Citizen Seven Star calibre: 5270

P1100012Last year I have developed quite a fondness of 60’s Citizen watches! A customer has sent in his Seven star cal 5270 that needs a routine service.

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Watch is preforming well, but is dry.

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This Citizen has a sophisticated automatic movement.

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I remove the oscillating weight. You can see some nasty grease in the upper barrel arbour.

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I remove the hands and dial. Here you can see the date and day disks.

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Removing the day disk reveals the complicated date/day/winding mechanism.

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I start taking the base movement apart.

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Here you can see the gear train layout.

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All the parts taken out and cleaned.

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I see that the balance moves freely.

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I have cleaned and lubricated the old mainspring.

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I start putting the movement back together.

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After fitting the gear train I start fitting the setting mechanism.

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Balance back in place and it’s running again.

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Date/day mechanism back in place only missing the day disk.

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Movement ready for dial and hands.

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Hands and dial back on the movement.

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Movement back in the case. You can actually see the upper barrel arbour jewel now.

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I fit the autowinder mechanism.

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Watch is running like it should.

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Great watch with a great movement! The finish is decent, but  you can see the focus was on the technical aspects and not decoration.

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