The Seiko 5S21-7000 is a watch model based on the 5S21 movement.
Parts List
| 285WA7SK01 | crystal |
| 37M05NA1 | crown |
| 37M05NS1 | crown |
| 0F240BAA3 | case back gasket - case back gasket |
| 0H2700B01 | case back gasket - case back gasket |
| GK58B | band - leather band |
| GK59B | band - leather band |
| 11T79AMM | hand - minute hand |
| 5S21700075 | others - case |
| 5S2170007E | others - case |
| 5S217000XS1Z | others - dial |
| 5S217010XS1Z | others - dial |
| 5S219 | others - machine code |
| 82832930 | others - case ring |
| A180BS | others - push pin |
| 0D005BA13 | others - crown and stem gasket |
| 0351683 | others - winding stem |
| 11SC73TL | others - second hand |
| 11T29AMM | others - minute hand |
| 11T63AMH | others - hour hand |
| 11T79AMH | others - hour hand |
Caliber 5S21
