The Seiko 7N42-7B40 is a watch model based on the 7N42 movement.
Parts List
| 310PX7TNC3 | crystal - crystal |
| 1E45C4TNG1 | crown - crown |
| 1E45C4TNA1 | crown - crown |
| FH3380B0A | case back gasket - case back gasket |
| 86179152 | crystal gasket - plastic gasket for crystal |
| 0Z3404B02 | bezel gasket - rotating bezel gasket |
| 43E3LB | band - band |
| 43E3JB | band - band |
| 43E3LB-LKG | band - link |
| 43E3JB-LKG | band - link |
| 43E3LB-BK2G | clasp - buckle |
| 43E3LB-PB1 | clasp - parts for buckle |
| 43E3JB-BK2G | clasp - buckle |
| 43E3JB-PB1 | clasp - parts for buckle |
| 2AB120L0BSW | others - minute hand |
| 1AB080L0BSW | others - hour hand |
| 1AB080L0BSG | others - hour hand |
| 2AB120L0BSG | others - minute hand |
| 3AX125F3ASW | others - second hand |
| 82838840 | others - case ring |
| 7N427B40U9 | others - case |
| 86312325 | others - rotating bezel |
| 7N427B40 | others - case back |
| 0878587 | others - date dial |
| 0878589 | others - date dial |
| 43E3JB-EPG | others - endpiece |
| 7N427B40WF | others - case |
| 86312324 | others - rotating bezel |
| 7N423 | others - machine code |
| 7N427C68XL14 | others - dial |
| 7N427C68XN13 | others - dial |
| 81332879 | others - click spring |
| 84327284 | others - dial ring |
| 84327285 | others - dial ring |
| A220CS | others - push pin |
| 43E3LB-EPG | others - endpiece |
| 0A0150B0A | others - crown and stem gasket |
| 89995390 | others - pusher spacer |