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Mainspring
For Unitas 307
1.40 x 0.110 x 290 x 9.5 mm
Height (H): 1.4mm
Thickness (T): 0.11mm
Total Length (TL): 290mm
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.
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-S18680 | CITIZE CASE REFERENCE | |
| Blancpain R620 | ||
| Citizen 4-S18680 | CITIZE CASE REFERENCE | |
| Citizen 4-273435 | CITIZEN CASE | |
| Seiko V400-523A | SEIKO CASE REFERENCE COSERVE 2003/2004 | |
| Citizen 4-297300 | CITIZEN CASE | |
| Citizen 4-S10867 | CITIZE CASE REFERENCE | |
| Citizen 4-S18680 | CITIZE CASE REFERENCE | |
| Longines M9031748 | LONGINES CASE REFERENCE | |
| Seiko 4005-7001 | SEIKO | |
| Seiko A861-4000 | SEIKO CASE REFERENCE COSERVE 2003/2004 | |
| Seiko V145-0E00 | SEIKO CASE REFERENCE COSERVE 2003/2004 | |
| Seiko V400-523A | SEIKO CASE REFERENCE COSERVE 2003/2004 | |
| Unitas 6457 |
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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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