The Seiko 8121-8000 is a watch model based on the 8121 movement.
Parts List
| 290W32GN00 | crystal - crystal |
| 35M82NA1 | crown - crown |
| 35M82NS1 | crown - crown |
| 86562390 | case back gasket - plastic gasket for case back |
| 86563000 | crystal gasket - plastic gasket for crystal |
| 86177240 | bezel gasket - plastic gasket for bezel |
| AL31A | band - band |
| GL18A | band - leather band |
| 12T20ASH | hand - hour hand |
| 12T20ASM | hand - minute hand |
| 12T20AGH | others - hour hand |
| 12T20AGM | others - minute hand |
| 82712160 | others - case ring |
| 8121800075 | others - case |
| 82333161 | others - bezel |
| 81211 | others - machine code |
| 8121800061 | others - case |
| 81218000XG18 | others - dial |
| 81218000XS17 | others - dial |
| 81218010XS19 | others - dial |
| 81218010XS29 | others - dial |
| 82333169 | others - bezel |
| A190BS | others - push pin |
| 0354765 | others - winding stem |
| 13SC04A2 | others - second hand |
| 13SC04ES | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
Caliber 8121
Other models with the same movement
| 8121-6000 |