Seiko 6220-4000 Watch Guide The Seiko 6220-4000 is a watch model based on the 6220 movement.Parts List45R02NcrownOther models with the same movement6220-29906220-70006220-70106220-70206220-70306220-70406220-70706220-70806220-70906220-71006220-71106220-71206220-71406220-79706220-79806220-79906220-80106220-89706220-89806220-89816220-89906220-90006220-99706220-99806220-9990