The Seiko 7T42-7A39 is a watch model based on the 7T42 movement.
Parts List
| 320W52JK01 | crystal |
| 35MG0NA1 | crown |
| 45MA2NA1 | crown - crown |
| 0351580 | crown - winding stem |
| 0A2800B01 | case back gasket |
| 86581880 | crystal gasket - plastic gasket for crystal |
| 86178710 | bezel gasket - plastic gasket for bezel |
| 80603201 | pusher |
| 03E52FJ | hand - small hand (9h) |
| 04E40CJ | hand - small hand(12h) |
| 0866599 | others - holding ring for dial |
| 0878527 | others - date dial |
| 7T423 | others - machine code |
| 7T427A39 | others - case back |
| 7T427A3975 | others - case |
| 7T427A50X914 | others - dial |
| 84321803 | others - dial ring |
| 86510149 | others - conducting plate |
| A180BS | others - push pin |
| 81400709 | others - button spring clip |
| 81350540 | others - button spring |
| EG0060B01 | others - button gasket |
| 04Y06AJH | others - hour hand |
| 82353561 | others - bezel |
| 0Z0060B01 | others - crown and stem gasket |
| 12SCA0HR | others - second hand |
| 12TD6DGM | others - minute hand |
| 12TD4NGH | others - hour hand |
Caliber 7T42
Other models with the same movement
| 7T42-6A00 |
| 7T42-6A0A |
| 7T42-6A0B |
| 7T42-6A10 |
| 7T42-6A20 |
| 7T42-6A49 |
| 7T42-6A50 |
| 7T42-6A5A |
| 7T42-6A60 |
| 7T42-6A6A |
| 7T42-7A00 |
| 7T42-7A10 |
| 7T42-7A20 |
| 7T42-7A2A |
| 7T42-7A40 |
| 7T42-7A4A |
| 7T42-7A4B |
| 7T42-7A50 |
| 7T42-7A5A |
| 7T42-7A5B |
| 7T42-F010 |
| 7T42-F01A |