The Seiko 1F20-5C70 is a watch model based on the 1F20 movement.
Parts List
| RE2N98JM01 | crystal |
| RE2N98JM | crystal |
| 30M98NA1 | crown |
| 0H1700B01 | case back gasket - bezel gasket |
| 0H1700B0 | case back gasket |
| B5565L-LKG | band - link |
| B5565L | band |
| B5565L-BK4S | clasp - clasp |
| A130AS | others - push pin (for lb) |
| 1F200F88XS29 | others - dial |
| 1F200F98XS19 | others - dial |
| 1F205C70 | others - case back |
| 1F205C7029Z | others - case |
| 1F209 | others - machine code |
| 82820380 | others - case ring |
| 0351807 | others - winding stem |
| 05Y16AGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 05Y16AGH | others - hour hand |
Caliber 1F20
