The Seiko 1F20-6J30 is a watch model based on the 1F20 movement.
Parts List
| K02A35JN02 | crystal - crystal |
| 6M30D5SNG1 | crown - crown |
| 6M30D5SNS0 | crown - crown (3h) |
| 0F120BA1S | case back gasket - case back gasket |
| E0N7AQ | band - band |
| E0N8CQ | band - band |
| E0N7AQ-BK00 | clasp - clasp |
| 1CA037A7BNG | others - hour hand |
| 1CA037A7BNS | others - hour hand |
| 2CA055A5BNG | others - minute hand |
| 2CA055A5BNS | others - minute hand |
| DB004BAD1 | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81190875 | others - bracelet fixing pipe |
| 82863650 | others - case ring |
| 1F206J3001A | others - case |
| 81607539 | others - bracelet fixing pin |
| 1F206J30 | others - case back |
| 1F206J3002A | others - case |
| 1F202T74XL13 | others - dial |
| 1F202T74XS14 | others - dial |
| 1F205 | others - machine code |
| 0351807 | others - winding stem |
Caliber 1F20
