The Seiko Y580-5520 is a watch model based on the Y580 movement.
Parts List
| SAFN86LM01 | crystal |
| 30N50NF1 | crown |
| 546BC | band - metal band |
| 546BC-BK5S | clasp - clasp |
| 546BC-EP2 | others - endpiece |
| 82715160 | others - case ring |
| Y5800 | others - machine code |
| Y5801000XS14 | others - dial |
| Y58055202N | others - case |
| 0354902 | others - setting/winding stem |
| 05R01DGH | others - hour hand |
| 05R17DGM | others - minute hand |