Seiko 0439-5009 Watch Guide The Seiko 0439-5009 is a watch model based on the 0439 movement.Parts ListBA0W44GNcrystalFE2810Bcase back gasketDJ2690Bcrystal gasketEH1175Bbezel gasketCaliber 0439Other models with the same movement0439-40090439-40190439-4029