Seiko 9256-5020 Watch Guide The Seiko 9256-5020 is a watch model based on the 9256 movement.Parts ListSA1W99HA00crystal40MA1NS9crown011340B0Acase back gasketEK2750B3Dcase back gasketOther models with the same movement9256-50009256-50109256-70009256-80009256-8010