The Seiko 7N42-7A50 is a watch model based on the 7N42 movement.
Parts List
| 290W36HN01 | crystal - crystal |
| 8M40A0NNG1 | crown - crown |
| 8M40A0SNW1 | crown - crown |
| FH2981B01 | case back gasket - case back gasket |
| 86574981 | crystal gasket |
| 86179411 | bezel gasket - plastic gasket for bezel |
| Z1676C-LKG | band - link |
| Z1676J | band |
| Z1676J-LKS | band - link |
| Z1676K-LKG | band - link |
| Z1676L | band - metal band |
| Z1676L-LKG | band - link |
| Z1676K | band |
| Z1676C | band |
| Z1676C-PB1 | clasp - parts for buckle/clasp |
| Z1676J-BK1S | clasp - clasp |
| Z1676C-BK1S | clasp - clasp |
| Z1676L-PB1 | clasp - parts for buckle/clasp |
| Z1676L-BK1G | clasp - clasp |
| Z1676K-PB1 | clasp - parts for buckle/clasp |
| Z1676J-PB1 | clasp - parts for buckle/clasp |
| Z1676K-BK1G | clasp - clasp |
| 2AB115L0BBG | others - minute hand |
| 1AB075LMBBG | others - hour hand |
| 3AA125F2ANS | others - second hand |
| 0351892 | others - winding stem |
| Z1676C-EPG | others - endpiece |
| 82830140 | others - case ring |
| 0878580 | others - date dial |
| 0878588 | others - date dial |
| 7N423 | others - machine code |
| 7N427A50 | others - case back |
| 7N427A5061Z | others - case |
| 7N427A5075Z | others - case |
| 7N427A5098 | others - case |
| 7N427A5098Z | others - case |
| 7N427A7LXS24 | others - dial |
| 7N427A7WXG14 | others - dial |
| 7N427A7WXS24 | others - dial |
| 7N427A8WXS19 | others - dial |
| 82284261 | others - bezel |
| 82284269 | others - bezel |
| A200BS | others - push pin |
| Z1676K-EPG | others - endpiece |
| Z1676L-EPG | others - endpiece |
| 3AX130F0ALG | others - second hand |
| AD006BA12 | others - crown gasket |
| 2AX120F2BLD | others - minute hand |
| 12CB6KSM | others - minute hand |
| 1AX085F2BLD | others - hour hand |
| 12CB6KSH | others - hour hand |