The Seiko 3Y02-0120 is a watch model based on the 3Y02 movement.
Parts List
| 210P07HN03 | crystal |
| 210P07HN | crystal |
| 35E57NA1 | crown |
| AC004BAA | case back gasket |
| FE223BAA3 | case back gasket |
| AC004BAA1 | case back gasket - crown and stem gasket |
| 86592750 | crystal gasket |
| 86170610 | bezel gasket - plastic gasket for bezel |
| B5623C-LKG | band - link |
| B5623G-LKG | band - link |
| B5623G | band |
| B5623C | band |
| B5623G-PB1 | clasp - parts for buckle/clasp |
| B5623C-PB1 | clasp - parts for buckle/clasp |
| B5623G-BK2G | clasp - clasp |
| B5623C-BK2S | clasp - clasp |
| 3BA125F1BNG | others - second hand |
| A120BS | others - push pin (for lb) |
| 0801754 | others - date dial |
| 0801812 | others - date dial |
| 3Y020120 | others - case back |
| 3Y02012075 | others - case |
| 3Y02012098 | others - case |
| 3Y020280XS14 | others - dial |
| 3Y02029LXS14 | others - dial |
| 3Y026 | others - machine code |
| 82350611 | others - bezel |
| 82841630 | others - case ring |
| 0351546 | others - winding stem |
| 09SC31NG | others - second hand |
| 09S13BGM | others - minute hand |
| 09S13BGH | others - hour hand |