The Seiko 7N42-9021 is a watch model based on the 7N42 movement.
Parts List
| 300P01LN03 | crystal - crystal (inorganic) |
| 8M40A0NNG3 | crown - crown |
| 8M40A0SNW1 | crown - crown |
| FE308BAA1 | case back gasket - case back gasket |
| 86590870 | crystal gasket - plastic gasket for crystal |
| 86561970 | bezel gasket - plastic gasket for bezel |
| 44C0JB | band - band |
| 4G08JW | band - leather band |
| LOCAL | band - band |
| 4E44KW | band - band |
| 4353LG | band - band |
| 4353JG | band - band |
| 4E43JW | band - leather band |
| 4353KG | band - band |
| 4353KG-LKG | band - link |
| 4353LG-LKG | band - link |
| 4353KG-BK1G | clasp - buckle |
| 4353KG-PB1 | clasp - parts for buckle |
| 4353LG-BK1S | clasp - buckle |
| 4353LG-PB1 | clasp - parts for buckle |
| 2BB120ACBSS | others - minute hand |
| 2BB120ACBLS | others - minute hand |
| 2BB120ACBSG | others - minute hand |
| 1AB082ABBSG | others - hour hand |
| 1AB082ABBSS | others - hour hand |
| 2AG120L0BBF | others - minute hand |
| 2BB120ACBLG | others - minute hand |
| 1AB082ABBLS | others - hour hand |
| 1AG080L2BBF | others - hour hand |
| 1AB082ABBLG | others - hour hand |
| 2AG120L0BDA | others - minute hand |
| 1AG080L2BDA | others - hour hand |
| 3AA125F3ANS | others - second hand |
| 3AA125F3ANG | others - second hand |
| 0351892 | others - winding stem |
| 0878580 | others - date dial |
| 0878588 | others - date dial |
| 0878589 | others - date dial |
| 7N42902198A | others - case |
| 82851310 | others - case ring |
| 82282959 | others - bezel |
| 82282951 | others - bezel |
| 7N42902161A | others - case |
| 7N429021 | others - case back |
| 7N42902175A | others - case |
| 7N423 | others - machine code |
| 7N429051XG14 | others - dial |
| 7N429051XL14 | others - dial |
| 7N429051XS13 | others - dial |
| 7N42905MXG14 | others - dial |
| 7N42905MXL14 | others - dial |
| 7N42905MXS13 | others - dial |
| 7N42906MXS13 | others - dial |
| 7N429071XS14 | others - dial |
| A180BS | others - push pin |
| 3AA125F3ANB | others - second hand |
| AD006BA12 | others - crown gasket |