Seiko Crystal Reference Table
| Model Number | Item | Diameter (mm) | Reference Number | Case Number |
| Seiko SKX007 / SKX009 / SKX011 | Crystal | 31.5 | 315P15HN02 | 7S26-0020 |
| Seiko SKX013 / SKX015 / SKX017 | Crystal | 28.0 | 280P53HN02 | 7S26-0030 |
| Seiko 5KX/SRPD | Crystal | 31.5 | 315P15HN02 | 4R36-07G0 |
| Seiko SBDC001 / SBDC003 / SDBC031 / SBDC033 | Crystal | 31.0 | 310P57HN03 | 6R15-00G0 |
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