The Seiko 4206-0521 is a watch model based on the 4206 movement.
Parts List
| 190W12GN00 | crystal |
| 190P02L50A | crystal - crystal |
| 190P02LN03 | crystal - crystal |
| 190W12GN | crystal |
| 40MC5NS1 | crown - crown |
| 40MC5NN1 | crown - crown (3h) |
| FH2030B04 | case back gasket |
| DB0055B01 | case back gasket - crown and stem gasket |
| DB0055B0 | case back gasket |
| 86178720 | crystal gasket - plastic gasket for crystal |
| 86592610 | crystal gasket - plastic gasket for crystal |
| G5061K | band - band |
| G5061K-LKG | band - link |
| G5061J | band - band |
| G5061K-BK1G | clasp - buckle |
| G5061K-PB1 | clasp - parts for buckle |
| 1AB050LEBFG | others - hour hand |
| 2AB070LCBFG | others - minute hand |
| 1AB050LEBFS | others - hour hand |
| 2AB070LCBFS | others - minute hand |
| 07C57BSM | others - minute hand |
| 07C57FSM | others - minute hand |
| 07C57BSH | others - hour hand |
| 07C57FSH | others - hour hand |
| 07C14LGM | others - minute hand |
| 2AA077LABLG | others - minute hand |
| 08C51LGH | others - hour hand |
| 07C14LGH | others - hour hand |
| 07C57FGM | others - minute hand |
| 07C57FGH | others - hour hand |
| 07C57BGH | others - hour hand |
| 08C51LGM | others - minute hand |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 3BA125F1BNG | others - second hand |
| 07SC17NG | others - second hand |
| 08SC01NG | others - second hand |
| 07SC17NS | others - second hand |
| 07SC43NG | others - second hand |
| 07SC43NS | others - second hand |
| A120BS | others - push pin (for lb) |
| 0801274 | others - date dial |
| 0884422 | others - holding ring for dial |
| 0884435 | others - holding ring for dial |
| 42062810XE13 | others - dial |
| 42062810XE24 | others - dial |
| 420655 | others - machine code |
| 42060521 | others - case back |
| 4206052175 | others - case |
| 4206052161 | others - case |
| 0351420 | others - winding stem |
| 83137810 | others - case ring |
| 06C39KGM | others - minute hand |
| 06C39KSM | others - minute hand |
| 06C39KKM | others - minute hand |
| 07C57BGM | others - minute hand |
| 06C39KGH | others - hour hand |
| 06C39KSH | others - hour hand |
| 06C39KKH | others - hour hand |
Caliber 4206
