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Mainspring
For IWC 37521
1.20 x 0.120 x 350 x 11.0 mm
Height (H): 1.2mm
Thickness (T): 0.12mm
Total Length (TL): 350mm
Barrel Diameter (BD): 11mm
End Type: Auto
To look for similar mainsprings that exactly match a specific dimension, select it from the links above.
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:
Movement Listing
This mainspring is used by the following movements:
| Movement | Description | Ligne |
|---|---|---|
| Citizen 21-4159 | CITIZE CASE REFERENCE | |
| Citizen 4-S57227 | CITIZEN CASE | |
| Citizen 4-E61147 | CITIZEN CASE | |
| Breitling 126 | ETA 2451 | |
| Bulova C867168 | ||
| Seiko W358-5A00 | PULSAR CASE REFERENCE | |
| Citizen 21-4159 | CITIZE CASE REFERENCE | |
| Citizen 39-5323 | CITIZE CASE REFERENCE | |
| Citizen 4-201621 | CITIZEN CASE | |
| Citizen 4-951239 | CITIZEN CASE | |
| Citizen 4-E61147 | CITIZEN CASE | |
| Citizen 4-F42724 | CITIZE CASE REFERENCE | |
| Citizen 4-S05413 | CITIZE CASE REFERENCE | |
| Citizen 4-S57227 | CITIZEN CASE | |
| Citizen 43-5056 | CITIZE CASE REFERENCE | |
| Ebosa 850.120 | 21,600 BPH W/O SECOND PIN LEVER | 8.75 |
| Election 275 | MECHANICAL MVMT | 5.5 x 7 |
| Bulova C867168 | ||
| Elgin 2377 | ||
| ETA 963.124 | QUARTZ-ANALOG-DSS-CALD.-(DAY-DATE) W/CORR. | 11.5 |
| Hamilton 809360 | HAMILT CASE REFERENCE | |
| Longines 950.2 | FOR MAINPLATE MUST SEND TO SWATCH FOR REPAIR | |
| Hamilton 809360 | HAMILT CASE REFERENCE | |
| Omega 311.028 | OMEGA CASE USES CALIBER | |
| Omega 368.0857 | OMEGA CASE USES CALIBER 752 | |
| Omega 7157 | OMEGA CASE USES CALIBER 483 | |
| Ricoh 634 | ||
| Seiko 4822-8010 | SEIKO CASE REFERENCE | |
| Seiko 6349-5180 | SEIKO CASE REFERENCE | |
| Seiko 4822-8010 | SEIKO CASE REFERENCE | |
| Seiko W358-5A00 | PULSAR 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:
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