Seiko A029-5020 Watch Guide The Seiko A029-5020 is a watch model based on the A029 movement.Parts ListBA0W31GE00crystalDJ2940B04case back gasket8617 0470crystal gasketOI 1400B0A Batteriefachbezel gasketOther models with the same movementA029-4000A029-5000A029-5010