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    Mainspring

    For Seiko 4N21-0720

    1.50 x 0.095 x 320 x 9.0 mm

    GR Reference #: GR4113T

    Height (H): 1.5mm

    Thickness (T): 0.095mm

    Total Length (TL): 320mm

    Barrel Diameter (BD): 9mm

    End Type: T

    To look for similar mainsprings that exactly match a specific dimension, select it from the links above.

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    Movement Listing

    This mainspring is used by the following movements:

    MovementDescriptionLigne
    Citizen 4-166337CITIZEN CASE
    Citizen 4-153723CITIZEN CASE
    Citizen 4-166337CITIZEN CASE
    Movado 31219800 BPH AUTO W/BALL BEAR CALENDAR MICRMETRIC REG7.75
    Seiko A628-5040SEIKO CASE REFERENCE
    Seiko W204-4020LORUS CASE REFERENCE
    Standard 969-418000 BPH - SHOCK - DSS - CALD - ADJ STUD HOLDER11.5

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    Similar Mainspring Listing

    This mainspring is similar to that used by the following movements. When values differ the exact value is shown brackets for reference:

    MovementMainspringGR Reference #
    Revue 731.40 (1.50) x 0.095 x 380 (320) x 10.0 (9.0) mm
    Wittnauer 731.40 (1.50) x 0.095 x 380 (320) x 10.0 (9.0) mm
    Wittnauer 771.40 (1.50) x 0.095 x 380 (320) x 10.0 (9.0) mm
    Wittnauer 7TN1.40 (1.50) x 0.095 x 380 (320) x 10.0 (9.0) mm
    Wittnauer 7TN1.40 (1.50) x 0.095 x 380 (320) x 10.0 (9.0) mm

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