The Seiko 4S12-0020 is a watch model based on the 4S12 movement.
Parts List
| 290PX5HN03 | crystal - crystal |
| 290X25HN03 | crystal - crystal |
| 1E60C7SNW0 | crown - crown |
| 0G330BA11 | case back gasket - rotating bezel gasket |
| 86620315 | crystal gasket - plastic gasket for crystal |
| 86621130 | bezel gasket - plastic gasket for bezel |
| 4842JG | band - band |
| D1B3AG | band - band |
| 4842JG-LK5 | band - link |
| 4842JG-BKF | clasp - buckle |
| 4842JG-PB1 | clasp - parts for buckle |
| 4CX090FABTW | others - sub hand |
| 1FA080LFBTS | others - hour hand |
| 2FA125LDBTS | others - minute hand |
| 3AX125FDASS | others - second hand |
| 4CX090FABTR | others - sub hand |
| 82862730 | others - case ring |
| 0354137 | others - winding stem |
| 4S12002061A | others - case |
| 82313519 | others - bezel |
| 86015179 | others - rotating bezel |
| 4S12002061B | others - case |
| 0878190 | others - date dial |
| 0878191 | others - date dial |
| 0884374 | others - holding ring for dial |
| 4S120024XB13 | others - dial |
| 4S120024XR13 | others - dial |
| 4S1220 | others - machine code |
| 89953899 | others - click ball |
| A130BS | others - push pin |
| 0A0150B0A | others - crown and stem gasket |
| 89995390 | others - pusher spacer |
Other models with the same movement