The Seiko 7N00-503H is a watch model based on the 7N00 movement.
Parts List
| ES0A63J20B | crystal |
| ES0A63J2 | crystal |
| 8M30Z1BNGB | crown - crown |
| 8M30Z1BN | crown |
| 0H2600B01 | case back gasket - case back gasket |
| 0H2600B0 | case back gasket |
| M1036G | band |
| M1036G-BK6G | clasp - clasp |
| M1036G-PB3 | clasp - parts for buckle/clasp |
| M1036G-EP2 | others - endpiece |
| 7N000 | others - machine code |
| 7N00503H | others - case back |
| 7N00503H26A | others - case |
| 7N005040XB14 | others - dial |
| 82843810 | others - case ring |
| 0351890 | others - winding stem |
| 2AE085LABDG | others - minute hand |
| AD006BA12 | others - crown gasket |
| 1AE055LABDG | others - hour hand |