Watch Database

    Mainspring

    For Zenith 20.5

    1.45 x 0.100 x 315 x 9.5 mm

    Height (H): 1.45mm

    Thickness (T): 0.1mm

    Total Length (TL): 315mm

    Barrel Diameter (BD): 9.5mm

    End Type: Manual

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

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    GR Approximation

    This mainspring does not have a GR reference. The following GR mainsprings are the closest fit, when values differ the exact value is shown brackets for reference:

    GR Reference #Mainspring
    GR39681.45 x 0.105 (0.100) x 320 (315) x 9.5 mm

    Movement Listing

    This mainspring is used by the following movements:

    MovementDescriptionLigne
    Bulova C877229CARAVE CASE REFERENCE
    Bulova N509CARAVE CASE REFERENCE
    Citizen 35-9785CITIZE CASE REFERENCE
    Citizen 39-0968CITIZE CASE REFERENCE
    Citizen 4-101952CITIZE CASE REFERENCE
    Citizen 4-108701CITIZEN CASE
    Citizen 4-163338CITIZEN CASE
    Citizen 4-228227CITIZEN CASE
    Citizen 4-273061CITIZEN CASE
    Citizen 4-314310CITIZEN CASE
    Citizen 4-350430CITIZEN CASE
    Citizen 4-530519CITIZEN CASE
    Citizen 4-660048CITIZE CASE REFERENCE
    Citizen 4-662326CITIZE CASE REFERENCE
    Citizen 4-680251CITIZEN CASE
    Citizen 4-852737CITIZE CASE REFERENCE
    Citizen 4-989155CITIZE CASE REFERENCE
    Citizen 4-E40794CITIZEN CASE
    Citizen 48-1564CITIZE CASE REFERENCE
    Citizen 98-0447CITIZE CASE REFERENCE
    ETA 2442BPH 21,600 OFF SET CENTER WHEEL6
    International Durowe 410FOR SWEEP SECOND USE DUROWE 41210.5
    Junghans 684.7411.25
    Longines 1916-L960LONGIN CASE REFERENCE
    Omega 131.1746OMEGA CASE REFERENCE
    Omega 17249OMEGA USES CALIBER 580
    Omega 18476OMEGA CASE USES CALIBER 440
    Omega 18619OMEGA CASE USES CALIBER 440
    Rayville 550BACKWIND 21,600 BPH5
    Seiko 1E20-0700SEIKO CASE REFERENCE COSERVE 2003/2004
    Seiko 2559-0110SEIKO CASE REFERENCE
    Seiko 6619-7030SEIKO CASE REFERENCE
    Seiko 7N39-0AV0SEIKO CASE REFERENCE COSERVE 2005
    Seiko V238-X004PULSAR CASE MODEL PHQ02AX
    Seiko V732-0T30SEIKO CASE REFERENCE COSERVE 2003/2004

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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 #
    Bettlach 5591.40 (1.45) x 0.130 (0.100) x 270 (315) x 10.0 (9.5) mm
    Hermann Becker 1151.40 (1.45) x 0.130 (0.100) x 270 (315) x 10.0 (9.5) mm
    Hermann Becker 11511.40 (1.45) x 0.130 (0.100) x 270 (315) x 10.0 (9.5) mm
    Hermann Becker 11611.40 (1.45) x 0.130 (0.100) x 270 (315) x 10.0 (9.5) mm
    Hermann Becker 1201.40 (1.45) x 0.130 (0.100) x 270 (315) x 10.0 (9.5) mm

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