The Seiko 1E20-0730 is a watch model based on the 1E20 movement.
Parts List
| 100N04GN00 | crystal |
| 100N04GN | crystal |
| 30M98NA1 | crown |
| 0H1000B01 | case back gasket |
| 0E100BA1S | case back gasket - case back gasket |
| 0H1000B0 | case back gasket |
| Q5041C | band |
| Q5041C-LKG | band - link |
| Q5041D-LKG | band - link |
| Q5041G-LKG | band - link |
| Q5041D | band |
| Q5041G | band |
| Q5041G-BK4G | clasp - clasp |
| Q5041D-BK4G | clasp - clasp |
| Q5041C-BK4G | clasp - clasp |
| 03V12DGH | others - hour hand |
| 03V12DGM | others - minute hand |
| 0351931 | others - winding stem |
| Q5041C-EPG | others - endpiece |
| Q5041D-EPG | others - endpiece |
| Q5041G-EPG | others - endpiece |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82722960 | others - case ring |
| 1E200730 | others - case back |
| 1E20073025 | others - case |
| 1E202290XB14 | others - dial |
| 1E202290XG14 | others - dial |
| 1E202290XS14 | others - dial |
| 1E202290XS24 | others - dial |
| 1E208 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
