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Seiko (SII) NH38 Automatic Movement - Open Heart

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Genuine SEIKO NH38 Movement with an open-heart display at 9 o'clock crown position. This movement is designed for dials with open-heart window

The TOP choice for movement swap with a direct view of the escapement from the watch face. Appreciating the beauty and intricacy of a mechanical movement.

With two available options:

  1. REGULATED
    Hugely improved on the accuracy! These are regulated by certified watchmakers from 0 to +8 seconds per day.
  2. NON-REGULATED
    Fresh out of the factory defaults without any regulation. Accuracy are in accordance to SEIKO's specification of -20 to +40 seconds per day.
Learn how to upgrade your movement, click here

IMPORTANT: Movement upgrade/swap is ONLY recommended for individuals with the right skillsets and experience. Lucius Atelier is not responsible for any damage to the movement during the fitting process. All movements passed Seiko Instruments Inc. (SII) QC prior to shipping are guaranteed to be a fully functional movement. Given the high degree of DIY nature and Seiko's trade practices, unfortunately, we are unable to accept any returns.

Made by Seiko Instruments Inc. (SII)

FREE WORLDWIDE SHIPPING

    1. Manufacturer Seiko Instruments Inc. (SII)
    2. Caliber NH38A
    3. Movement Type Automatic, Mechanical
    4. Movement Diameter 27.40mm
    5. Casing Diameter 29.36mm (with dial holding spacer)
    6. Movement Height 5.32mm
    7. Jewels 24 jewels
    8. Beats Per Hour 21,600 vph (6 vibrations per second)
    9. Special Feature Open-Heart (Display of escapement)
    10. Hacking Yes
    11. Manual Winding Yes
    12. Winding Direction Clockwise
    13. Power Reserve More than 41 Hours
    14. Hands Fitting Size H:150mm, M:88mm, S:20mm
    1. Movement x1
    2. Full length threaded stem x1
    3. Dummy stem & plastic crown x1
    1. To learn how to upgrade your movement, search YouTube: NH36 Movement Upgrade

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