Seiko 6T63-00N0 Watch Guide The Seiko 6T63-00N0 is a watch model based on the 6T63 movement.Caliber 6T63Other models with the same movement6T63-00A06T63-00B06T63-00C06T63-00D06T63-00E06T63-00F06T63-00G06T63-00H06T63-00J06T63-00K06T63-00P0