The Seiko 2E20-681H is a watch model based on the 2E20 movement.
Parts List
| ES0A59J20B | crystal - crystal |
| ES0A59J2 | crystal |
| 6M25Z1NNGB | crown |
| 6M25Z1NN | crown |
| 0H1400B01 | case back gasket - case back gasket |
| 0H1400B0 | case back gasket |
| M5105G | band - metal band |
| LOCAL | band - band |
| M5105G-BK6G | clasp - buckle |
| M5105G-PB3 | clasp - parts for buckle |
| 2E202290XA14 | others - dial |
| 2E2062 | others - machine code |
| 2E20681HFYA | others - case |
| 82843770 | others - case ring |
| 2E20681H | others - case back |
| 0351207 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| DZ0040B01 | others - crown and stem gasket |
| 0351205 | others - winding stem |
| 04V19JGM | others - minute hand |
| 04L13JGH | others - hour hand |
Caliber 2E20
