Seiko 6602-8990 Watch Guide The Seiko 6602-8990 is a watch model based on the 6602 movement.Parts List308W03AN00crystal55W02NA1crown55W02NS1crownCaliber 6602Other models with the same movement6602-19906602-29906602-50006602-70006602-70206602-70306602-70316602-70406602-79926602-80006602-80106602-80206602-80306602-80406602-80506602-80706602-89726602-90006602-90106602-99806602-99816602-99826602-9987