Seiko Prospex Asia Pacific Limited Edition. 1600 pieces worldwide SPB541J1 Fashion this 31 mm model features this 31 mm model features a fluted bezel and a crisp white dial with a Cyclops lens over the date for enhanced readability high performance Paraflex shock absorbersWinding: Bidirectional self winding via Perpetual rotorPower Reserve: Approximately 72 hoursDial Color: Bright blackHour Markers: [Applied indexes per Rolex design]Hands: Silvered polished hands with Chromalight luminescenceSpecificities: Highly legible Chromalight display with long lasting blue luminescenceCase Shape: RoundMaterial: Yellow Rolesor – combination of Oystersteel and yellow goldBezel Type: Fluted Product Features : Band Material Silicon Band Colour Black