The Seiko 5M42-0A40 is a watch model based on the 5M42 movement.
Parts List
| 280P03TNC3 | crystal |
| 280P03TN | crystal |
| 8K50A4SNG1 | crown |
| 8K50A4SN | crown |
| 86177921 | crystal gasket - plastic gasket for crystal |
| 86178990 | bezel gasket - plastic gasket for bezel |
| EC0060B01 | pusher - pusher gasket |
| 80607061 | pusher |
| 43Q1LB | band |
| 43Q1LB-LKG | band - link |
| 43Q1LB-PB1 | clasp - parts for buckle/clasp |
| 43Q1LB-BK7S | clasp - clasp |
| A130AS | others - push pin (for lb) |
| 0866637 | others - holding ring for dial |
| 0878729 | others - date dial |
| 81332069 | others - casing spring |
| 5M420A40RS | others - case |
| 5M420B00XS14 | others - dial |
| 5M428 | others - machine code |
| 82289309 | others - bezel |
| 84325924 | others - dial ring |
| 81400709 | others - button spring clip |
| 81350540 | others - button spring |
| 0351651 | others - winding stem |
| 0Z0060B01 | others - crown and stem gasket |
| 81400829 | others - button spring clip |
| 3AX115F5ASG | others - second hand |
| 2AB115LNBSG | others - minute hand |
| 1AB075LPBSG | others - hour hand |
Caliber 5M42
