The Seiko 4N21-1180 is a watch model based on the 4N21 movement.
Parts List
| 200A02SN02 | crystal - crystal (sapphire) |
| 6M30E1SNS0 | crown - crown |
| 0F170BA1S | case back gasket - case back gasket |
| 48Q51Z | band - band |
| 2BE085LABDS | others - minute hand |
| 3BA090F1BNS | others - second hand |
| 1BE055LABDS | others - hour hand |
| 0351156 | others - winding stem |
| DB004BAD1 | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81190075 | others - bracelet fixing pipe |
| 82841595 | others - case ring |
| 4N211180 | others - case back |
| 4N21118061A | others - case |
| 4N21118061B | others - case |
| 4N212790XG13 | others - dial |
| 4N212790XS13 | others - dial |
| 4N2165 | others - machine code |
| 89942935 | others - back plate |