Watch Database

    Mainspring

    For Hamilton 921

    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 #MainspringBuy
    GR39681.45 x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    GR39541.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    GR39551.45 x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    GR36811.40 (1.45) x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    GR39531.45 x 0.100 x 300 (315) x 9.0 (9.5) mm
    Buy mainspring

    Movement Listing

    This mainspring is used by the following movements:

    MovementDescriptionLigne
    A. Schild 91212
    Bettlach 8429PIN LEVER-SMALL SEC-CALD-CHRONO-MIN REC13.5
    Bulova C4075BULOVA CASE REFERENCE
    Bulova C876264BULOVA CASE REFERENCE
    Bulova E121BULOVA 2500.10 S.M.Q.
    Citizen 3721A
    Citizen 4-088701CITIZEN CASE
    Citizen 4-106539CITIZEN CASE
    Citizen 4-H04406CITIZEN CASE
    Citizen 4-294572CITIZEN CASE
    Citizen 4-370112CITIZEN CASE
    Citizen 4-295862CITIZEN CASE
    Seiko 9923-702ASEIKO
    Citizen 4-311931CITIZE CASE REFERENCE
    Citizen 4-398033CITIZEN CASE
    Citizen 4-370112CITIZEN CASE
    Citizen 4-385284CITIZEN CASE
    Citizen 4-398033CITIZEN CASE
    Citizen 4-F92616CITIZEN CASE
    Citizen 4-G31247CITIZEN CASE
    Citizen 4-H04406CITIZEN CASE
    Citizen 4-R03871CITIZEN CASE
    Citizen 4-Y60594CITIZEN CASE
    Seiko 5H23-7B30SEIKO CASE REFERENCE
    Citizen 4-Y67271CITIZEN CASE
    Cyma Tavannes 45810.5
    Citizen 4-G31247CITIZEN CASE
    Fontainemelon 261913
    Phenix 90418
    Seiko Y960-5070PULSAR CASE REFERENCE
    Recta CAFOR SWEEP SECOND USE RECTA9.75
    Citizen 4-311931CITIZE CASE REFERENCE
    Ronda 40PIN LEVER SWEEP SECOND13
    Seiko 2E50-501HSEIKO CASE REFERENCE
    Citizen 4-F92616CITIZEN CASE
    Seiko 5A70-0500SEIKO CASE REFERENCE COSERVE 2003/2004
    Seiko 5H23-7B30SEIKO CASE REFERENCE
    Seiko 6439AQUARTZ-ANALOG-CAL10.75
    Seiko 7430-0029SEIKO CASE REFERENCE
    Seiko 8243-7030SEIKO CASE REFERENCE
    Seiko 9923-702ASEIKO
    Seiko V700-5009SEIKO CASE REFERENCE
    Citizen 4-385284CITIZEN CASE
    Seiko Y960-5070PULSAR CASE REFERENCE
    Citizen 4-Y60594CITIZEN CASE
    Wittnauer WT4418-5QWITTNA CASE REFERENCE

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    Similar Mainspring Listing

    This mainspring is similar to the mainspring used by the following movements. A similar mainspring differs slightly in one or more dimensions but may possibly still work as a replacement. When values differ the exact value is shown brackets for reference:

    MovementMainspringBuy
    Fontainemelon 7611.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 671.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 6761.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 6711.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 76-21.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    International Durowe 12581.40 (1.45) x 0.095 (0.100) x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    International Durowe 12601.40 (1.45) x 0.095 (0.100) x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    International Durowe 12661.40 (1.45) x 0.095 (0.100) x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    A. Schild 15581.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 811.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 676-41.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    International Durowe 12851.40 (1.45) x 0.095 (0.100) x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Femga 520B1.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 6751.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 8111.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 671-21.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 67-21.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    International Durowe 12651.40 (1.45) x 0.095 (0.100) x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 675-41.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Femga 535B1.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    A. Schild 15061.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 761-21.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    A. Schild 15071.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Enicar 10201.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 811-21.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Geneva Sport Watch 401.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Geneva Sport Watch 501.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Geneva Sport Watch 511.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Geneva Sport Watch 701.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Geneva Sport Watch 711.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    A. Schild 15511.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Dugena 11471.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Dugena 9761.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Fontainemelon 6721.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 6731.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Fontainemelon 6741.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Fontainemelon 677-81.40 (1.45) x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 6841.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Fontainemelon 7621.40 (1.45) x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 7631.40 (1.45) x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 8141.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Fontainemelon 8151.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Geneva Sport Watch 1411.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Geneva Sport Watch 1511.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Geneva Sport Watch 1711.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Recta EA61.40 (1.45) x 0.100 x 315 x 9.5 mm
    Buy mainspring
    Winton 862-171.45 x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Winton 962-171.45 x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Winton 861.45 x 0.105 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 821-41.40 (1.45) x 0.110 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 28.2N1.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 82-41.40 (1.45) x 0.110 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Winton 771.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1791.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 281.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 541.40 (1.45) x 0.100 x 300 (315) x 9.0 (9.5) mm
    Buy mainspring
    Roamer 9561.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 281-21.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 521.40 (1.45) x 0.100 x 300 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2811.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 8211.40 (1.45) x 0.110 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Alpina 6681.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2051.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Benrus AT1.40 (1.45) x 0.100 x 340 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 1861.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1751.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 821.40 (1.45) x 0.110 (0.100) x 320 (315) x 9.5 mm
    Buy mainspring
    Fontainemelon 175-1-31.45 x 0.110 (0.100) x 320 (315) x 10.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1761.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1841.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1881.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1911.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1961.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 1981.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2041.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2151.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2161.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2211.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2231.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring
    Fontainemelon 2321.45 x 0.100 x 320 (315) x 9.0 (9.5) mm
    Buy mainspring

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