The Seiko 4N21-1100 is a watch model based on the 4N21 movement.
Parts List
| 195A17SN02 | crystal - crystal |
| 6M40A1NNW0 | crown - crown |
| 0F160BA1S | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| D121AQ-LK00 | band - link |
| D121AQ-LK4 | band - link |
| D121AQ | band - band |
| D121AQ-BKX | clasp - buckle |
| D121AQ-PB2 | clasp - parts for buckle |
| 1BH055A1BAC | others - hour hand |
| 2BH080A1BAC | others - minute hand |
| 3BA090F1BNS | others - second hand |
| 1BH055A1BNS | others - hour hand |
| 2BH080A1BNS | others - minute hand |
| A120BS | others - push pin (for lb) |
| 4N21110079B | others - case |
| 4N212500XS19 | others - dial |
| 4N212510XB13 | others - dial |
| 4N212770XB13 | others - dial |
| 4N212890XS19 | others - dial |
| 4N2165 | others - machine code |
| D121AQ-EP5 | others - endpiece |
| 82832635 | others - case ring |
| 4N21110079A | others - case |
| 4N211100 | others - case back |
| 0351156 | others - winding stem |
| 195A17SN02 | crystal - crystal |
| 6M40A1NNW0 | crown - crown |
| 0F160BA1S | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| D121AQ-LK00 | band - link |
| D121AQ-LK4 | band - link |
| D121AQ | band - band |
| D121AQ-BKX | clasp - buckle |
| D121AQ-PB2 | clasp - parts for buckle |
| 1BH055A1BAC | others - hour hand |
| 2BH080A1BAC | others - minute hand |
| 3BA090F1BNS | others - second hand |
| 1BH055A1BNS | others - hour hand |
| 2BH080A1BNS | others - minute hand |
| A120BS | others - push pin (for lb) |
| 4N21110079B | others - case |
| 4N212500XS19 | others - dial |
| 4N212510XB13 | others - dial |
| 4N212770XB13 | others - dial |
| 4N212890XS19 | others - dial |
| 4N2165 | others - machine code |
| D121AQ-EP5 | others - endpiece |
| 82832635 | others - case ring |
| 4N21110079A | others - case |
| 4N211100 | others - case back |
| 0351156 | others - winding stem |