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Mainspring
For Unitas 309
1.40 x 0.090 x 315 x 9.0 mm
Height (H): 1.4mm
Thickness (T): 0.09mm
Total Length (TL): 315mm
Barrel Diameter (BD): 9mm
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 |
|---|---|---|
| Bulova C852064A | BULOVA CASE REFERENCE | |
| Bulova C875405 | ||
| Citizen 4-F80146 | CITIZEN CASE | |
| Citizen 39-7873 | CITIZE CASE REFERENCE | |
| Citizen 4-406656 | CITIZEN CASE | |
| Citizen 4-F80146 | CITIZEN CASE | |
| Citizen 4-H30067 | ||
| Seiko 7S26-8120 | MECHANICAL | |
| Citizen 4-K08137 | CITIZEN CASE | |
| Citizen 4-L00866 | CITIZEN CASE | |
| Citizen 4-S011051 | CITIZEN CASE REFERENCE | |
| Gruen 245 | 6 | |
| Omega 3702 | OMEGA CASE USES CALIBER 300 | |
| Otero 907 | 11.5 | |
| Seiko 5T52-0AB0 | SEIKO CASE REFERENCE COSERVE 2005 | |
| Seiko 6530-5860 | SEIKO CASE REFERENCE | |
| Seiko 7A38-7029 | SEIKO CASE REFERENCE | |
| Seiko 7S26-8120 | MECHANICAL | |
| Seiko 9300-5008 | SEIKO CASE REFERENCE | |
| Seiko A258-5040 | SEIKO CASE REFERENCE | |
| Seiko V722-7A20 | SEIKO CASE | |
| Zenith 1724C | 19,800 BPH 25 JL DSS AUTO CAL | 7.75 |
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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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