The Seiko 7N42-8100 is a watch model based on the 7N42 movement.
Parts List
| 290P01LN03 | crystal - crystal (inorganic) |
| 8M35A0SMN1 | crown - crown |
| FE298BAA1 | case back gasket - case back gasket |
| 86582730 | crystal gasket - plastic gasket for crystal |
| 43Z0JB | band - band |
| 43Z0AB | band - band |
| 48F9JZ | band - band |
| 43Z0AB-LKS | band - link |
| 43Z0JB-LKG | band - link |
| 48F9JZ-LK4 | band - link |
| 48F9JZ-BKJ | clasp - buckle |
| 48F9JZ-PB1 | clasp - parts for buckle |
| 43Z0JB-BK1G | clasp - buckle |
| 43Z0JB-PB1 | clasp - parts for buckle |
| 43Z0AB-BK1S | clasp - buckle |
| 43Z0AB-PB1 | clasp - parts for buckle |
| 4647LB-BK | clasp - faltverschluss |
| 2AB115L0BNS | others - minute hand |
| 2AX120F4BSS | others - minute hand |
| 1AX080F0BSS | others - hour hand |
| 2AC120FABSS | others - minute hand |
| 2BB115LCBSS | others - minute hand |
| 1AC082FABSS | others - hour hand |
| 1AB075L4BNS | others - hour hand |
| 3AA125F3ANS | others - second hand |
| 3AX135F0ASJ | others - second hand |
| 1AB075LPBSS | others - hour hand |
| A110BS | others - push pin (for mb) |
| 0878580 | others - date dial |
| 0878587 | others - date dial |
| 82850970 | others - case ring |
| 7N428100WFA | others - case |
| 7N428100 | others - case back |
| 0351892 | others - winding stem |
| 7N428100WFB | others - case |
| 7N423 | others - machine code |
| 7N428170XY13 | others - dial |
| 7N428171XS13 | others - dial |
| 7N428171XY13 | others - dial |
| 7N428371XL13 | others - dial |
| 7N428381XB13 | others - dial |
| 7N428391XN19 | others - dial |
| AD006BA12 | others - crown gasket |
| 3AX125F3ASS | others - second hand |