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Mainspring
For Seiko F421-4000
1.20 x 0.120 x 300 x 9.5 mm
GR Reference #: GR2972
Height (H): 1.2mm
Thickness (T): 0.12mm
Total Length (TL): 300mm
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.
Movement Listing
This mainspring is used by the following movements:
| Movement | Description | Ligne |
|---|---|---|
| Bulova C815138 | BULOVA CASE REFERENCE | |
| Citizen 31-6121 | CITIZE CASE REFERENCE | |
| Citizen 4-S04387 | CITIZE CASE REFERENCE | |
| Citizen 4-821122 | CITIZEN CASE | |
| Citizen 4-F41141 | CITIZEN CASE | |
| Citizen 4-H04783 | CITIZEN CASE | |
| Citizen 4-S04387 | CITIZE CASE REFERENCE | |
| Citizen 4120 | 18000 BPH | 13 |
| Bulova C815138 | BULOVA CASE REFERENCE |
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Similar Mainspring Listing
This mainspring is similar to that used by the following movements. When values differ the exact value is shown brackets for reference:
| Movement | Mainspring | GR Reference # |
|---|---|---|
| IWC 63 12 | 1.10 (1.20) x 0.140 (0.120) x 290 (300) x 10.0 (9.5) mm | |
| IWC 63T 12 | 1.10 (1.20) x 0.140 (0.120) x 290 (300) x 10.0 (9.5) mm |
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