The Seiko 3Y02-0B20 is a watch model based on the 3Y02 movement.
Parts List
| 200W42JE01 | crystal |
| 200W42JE | crystal |
| 30MB6NA1 | crown |
| FH2080B01 | case back gasket - case back gasket |
| EZ0035B0 | case back gasket |
| 86580100 | crystal gasket - plastic gasket for crystal |
| 86179140 | bezel gasket - plastic gasket for bezel |
| B5651L | band |
| B5651L-LKG | band - link |
| B5651L-PB1 | clasp - parts for buckle/clasp |
| B5651L-BK1S | clasp - clasp |
| 08SC14NG | others - second hand |
| 82804020 | others - case ring |
| 0801754 | others - date dial |
| 3Y020B20 | others - case back |
| 3Y020B2098Z | others - case |
| 3Y020C4WXS14 | others - dial |
| 3Y026 | others - machine code |
| 82354061 | others - bezel |
| A100AS | others - push pin |
| 0351546 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 08T16LGM | others - minute hand |
| 08T16LGH | others - hour hand |