The Seiko 5420-5540 is a watch model based on the 5420 movement.
Parts List
| RE3N98GN00 | crystal - crystal |
| RE3N98GN | crystal |
| 35N18NA1 | crown |
| 0G0055B0 | case back gasket |
| 0A1700N01 | case back gasket - case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| B5115G | band - metal band |
| B5115G-BK3G | clasp - clasp |
| 05R22D3H | hand - hour hand |
| 05R22D3M | hand - minute hand |
| 54201020X994 | others - dial |
| 54201020XG14 | others - dial |
| 5420554025 | others - case |
| 54209 | others - machine code |
| T060BS | others - push pin |
| 0354706 | others - winding stem |
| 82705380 | others - case ring |
Caliber 5420
