Seiko 8F56-X001 Watch Guide The Seiko 8F56-X001 is a watch model based on the 8F56 movement.Other models with the same movement8F56-00108F56-00198F56-001A8F56-00208F56-00298F56-002A8F56-00308F56-00408F56-00508F56-00608F56-00708F56-00808F56-00908F56-00A08F56-00B08F56-00C08F56-00D08F56-00E08F56-00F08F56-00G08F56-00H08F56-00J08F56-00K08F56-00L08F56-00M08F56-01208F56-01308F56-01408F56-0150