The Seiko 1F20-6C90 is a watch model based on the 1F20 movement.
Parts List
| ES1A28JR02 | crystal - crystal |
| ES1A28JR | crystal |
| 35M1RNA1 | crown - crown |
| 35MR1NA1 | crown |
| 0E180NA1S | case back gasket - case back gasket |
| 0F180NA1S | case back gasket - case back gasket |
| 43F5CB | band - band |
| 43F5BB | band - band |
| 43F5LB | band - band |
| 43F5BB-LKG | band - link |
| 43F5CB-LKG | band - link |
| 43F5KB-LKG | band - link |
| 43F5LB-LKG | band - link |
| 43F5KB | band - band |
| 43F5KB-BKCG | clasp - buckle |
| 43F5KB-PB2 | clasp - parts for buckle |
| 43F5LB-BKCG | clasp - buckle |
| 43F5LB-PB2 | clasp - parts for buckle |
| 43F5CB-BKCG | clasp - buckle |
| 43F5CB-PB2 | clasp - parts for buckle |
| 43F5BB-BKCG | clasp - buckle |
| 43F5BB-PB2 | clasp - parts for buckle |
| 2CE042L2BDG | others - minute hand |
| 1CE027L0BDG | others - hour hand |
| 0351807 | others - winding stem |
| 1F206C9025Z | others - case |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1F206C9025 | others - case |
| 82836740 | others - case ring |
| 1F206C90 | others - case back |
| 1F202L30XG14 | others - dial |
| 1F202L30XS24 | others - dial |
| 1F202L38XG14 | others - dial |
| 1F202L38XS24 | others - dial |
| 1F205 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
| 04Y23DGH | others - hour hand |
Caliber 1F20
