The Seiko 5Y23-5099 is a watch model based on the 5Y23 movement.
Parts List
| ES7N48GN00 | crystal |
| ES7N48GN | crystal |
| 35M98NA1 | crown |
| 0G0055B0 | case back gasket |
| 0H2702B01 | case back gasket - rotating bezel gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| Z1514K | band |
| Z1514K-BK5G | clasp - clasp |
| 0801722 | others - date dial |
| 5Y235058XG14 | others - dial |
| 5Y235099 | others - case back |
| 5Y23509925 | others - case |
| 5Y238 | others - machine code |
| 82814420 | others - case ring |
| A180BS | others - push pin |
| 0351670 | others - winding stem |
| 13SC04A2 | others - second hand |
| 10T42CBM | others - minute hand |
| 10T42CBH | others - hour hand |