The Seiko 4N20-5110 is a watch model based on the 4N20 movement.
Parts List
| K06N31SN01 | crystal |
| 35MV1NE5 | crown |
| 0H1650B01 | case back gasket - case back gasket |
| 81505591 | band - other |
| GK15C | band - leather band |
| 82840190 | others - case ring |
| 82840195 | others - case ring |
| 0351156 | others - winding stem |
| 05Y17DBM | others - minute hand |
| 4N200190XS19 | others - dial |
| 4N205110 | others - case back |
| 4N2051103EA | others - case |
| 4N2060 | others - machine code |
| 81351670 | others - spring |
| 81505571 | others - screw |
| 0D005BA11 | others - (crowndichtung) |
| 05Y17NBH | others - hour hand |