Seiko Y735-4B10 Watch Guide The Seiko Y735-4B10 is a watch model based on the Y735 movement.Other models with the same movementY735-4A00Y735-4A10Y735-4A20Y735-4A30Y735-4A40Y735-4A50Y735-4A60Y735-4A70Y735-4A90Y735-4B00Y735-4B20Y735-4B30Y735-5009Y735-X001