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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 4-158431 | CITIZEN CASE | |
| Bulova C873156 | ||
| Bulova N540 | CARAVELLE CASE REFERENCE | |
| Citizen 4-078306 | CITIZEN CASE | |
| Citizen 4-158431 | CITIZEN CASE | |
| Citizen 4-571703 | CITIZEN CASE | |
| Citizen 4-E65134 | CITIZEN CASE | |
| Citizen 4-F91539 | CITIZEN CASE | |
| Seiko V732-0140 | SEIKO CASE | |
| Citizen 4-H17991 | CITIZEN CASE REFERENCE | |
| Seiko 1E70-0AW0 | SEIKO CASE REFERENCE COSERVE 2005 | |
| Citizen 4-H21408 | CITIZEN CASE | |
| Citizen 49-2353 | CITIZE CASE REFERENCE | |
| Citizen AC-0015 | CITIZEN CASE REFERENCE | |
| Miyota 3W10 | QUARTZ ANALOG DSS CALD | 10 x 10.5 |
| Omega 14335 | OMEGA CASE - USES CALIBER 410 | |
| Omega 18034 | OMEGA USES CALIBER 210/212 | |
| Omega 19034 | OMEGA CASE USES CALIBER 491 | |
| Omega 191.106 | OMEGA CASE - USES CALIBER 1365 | |
| Omega 2235 | OMEGA CASE USES CALIBER 260 | |
| Omega 2802-9SC | OMEGA CASE REFERENCE | |
| Seiko 1600-5890 | SEIKO CASE REFERENCE | |
| Seiko 1E70-0AW0 | SEIKO CASE REFERENCE COSERVE 2005 | |
| Seiko 4N01-0119 | SEIKO CASE REFERENCE | |
| Seiko 8M25-603A | SEIKO CASE REFERENCE | |
| Seiko V732-0140 | SEIKO CASE | |
| Tissot 27B-21 | 12 |
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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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