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Mainspring
For Seiko 5S21-7A20
1.60 x 0.080 x 300 x 8.0 mm
GR Reference #: GR4448
Height (H): 1.6mm
Thickness (T): 0.08mm
Total Length (TL): 300mm
Barrel Diameter (BD): 8mm
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 |
|---|---|---|
| Citizen 4-S35789 | CITIZEN CASE | |
| Hamilton 927 | AMERICAN P/W HUNTING CASE 17 JEWEL | |
| Bettlach 8370-67 | 10.5 | |
| Citizen 4-228065 | CITIZEN CASE | |
| Citizen 4-731255 | CITIZEN CASE | |
| Citizen 4-796756 | CITIZE CASE REFERENCE | |
| Gruen 3137 | SEE GRU 341 | |
| Citizen 4-H04660 | CITIZEN CASE | |
| Citizen 4-Q00460 | CITIZEN CASE | |
| Citizen 4-R01088 | CITIZE CASE REFERENCE | |
| Citizen 4-S35789 | CITIZEN CASE | |
| ETA 765 | 6.75 x 11 | |
| Gruen 3137 | SEE GRU 341 | |
| Hamilton 726 | ||
| Omega 168.0034 | OMEGA CASE - USES CALIBER 751 | |
| Hamilton 927 | AMERICAN P/W HUNTING CASE 17 JEWEL | |
| Judex 36-21 INT S | 21,600 BPH | 8.75 |
| Longines 3Q | QUARTZ- | |
| Omega 18450 | OMEGA CASE USES CALIBER 483/580 | |
| Lucien Piccard 78 | SW. SEC | 11.5 |
| Citizen 4-S35789 | CITIZEN CASE | |
| Omega 168.0034 | OMEGA CASE - USES CALIBER 751 | |
| Omega 18450 | OMEGA CASE USES CALIBER 483/580 | |
| Omega 511.231 | OMEGA CASE USES CALIBER 620 | |
| Seiko H601-5070 | SEIKO 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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