The Seiko 1F20-1C80 is a watch model based on the 1F20 movement.
Parts List
| 190A02SN02 | crystal - crystal (sapphire) |
| 190A02SN | crystal |
| 6M35A9NNG1 | crown - crown |
| 6M35A9NNW0 | crown |
| 6M35A9NN | crown |
| 0F180NA1S | case back gasket - case back gasket |
| 0F180NA1 | case back gasket |
| 4F82JZ | band - leather strap |
| 4F84KZ | band - band |
| 4F83LZ | band - band |
| 4FE9LZ | band - band |
| 4F82JZ-BK7S | clasp - buckle |
| 4F82JZ-PB1 | clasp - parts for buckle |
| 4F84KZ-BK7G | clasp - buckle |
| 4F84KZ-PB1 | clasp - parts for buckle |
| 4F83LZ-BK7G | clasp - buckle |
| 4F83LZ-PB1 | clasp - parts for buckle |
| 2CB080A0BNS | others - minute hand |
| 1CB055A0BNS | others - hour hand |
| 2CB080A0BNG | others - minute hand |
| 0351807 | others - winding stem |
| 1CB055A0BNG | others - hour hand |
| 81604259 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 82836860 | others - case ring |
| 1F201C8061Z | others - case |
| 1F201C80 | others - case back |
| 1F201C8098Z | others - case |
| 1F201C8075Z | others - case |
| DZ0040B01 | others - crown and stem gasket |
| 1F202L68XL23 | others - dial |
| 1F202L68XS14 | others - dial |
| 1F202M38XS34 | others - dial |
| 1F205 | others - machine code |
| 4F82JZ-EP7 | others - endpiece |
| 4F83LZ-EP7 | others - endpiece |
| 4F84KZ-EP7 | others - endpiece |
| 4FE9LZ-EP7 | others - endpiece |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1F20
