The Seiko 5E20-5B20 is a watch model based on the 5E20 movement.
Parts List
| SAEN86JN01 | crystal |
| SAEN86JN | crystal |
| 30M62NA3 | crown |
| 0H2702B01 | case back gasket - rotating bezel gasket |
| 0H2702B0 | case back gasket |
| B1786G NL | band |
| B1786G | band - (nl) |
| NL | band |
| B1786C-LKG | band - link |
| B1786C | band - (nl) |
| B1786C NL | band |
| B1786C-PB1 | clasp - parts for buckle/clasp |
| B1786G-BK2G | clasp - clasp |
| B1786C-BK7S | clasp - clasp |
| 81180229 | others - bracelet fixing pipe |
| 81604939 | others - bracelet fixing pin |
| 5E205 | others - machine code |
| 5E205B20 | others - case back |
| 5E205B202L | others - case |
| 5E205B20CH | others - case |
| 5E205B70XS14 | others - dial |
| 5E205B70XS24 | others - dial |
| 5E205B80XS19 | others - dial |
| 5E205B80XS29 | others - dial |
| 82830300 | others - case ring |
| 0351624 | others - winding stem |
| 2BA090A0BNG | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
| 2BD090A0BAA | others - minute hand |
| 2BD090A0BAC | others - minute hand |
| 09T18NGM | others - minute hand |
| 09TD0AGM | others - minute hand |
| 1BD060A0BAC | others - hour hand |
| 1BA057A0BNG | others - hour hand |
| 1BD060A0BAA | others - hour hand |
| 09TD0AGH | others - hour hand |
| 09TD2NGH | others - hour hand |
Caliber 5E20
