Seiko 5420-5159 Watch Guide The Seiko 5420-5159 is a watch model based on the 5420 movement.Caliber 5420Other models with the same movement5420-00105420-00195420-00205420-00295420-00395420-00405420-00495420-00505420-00595420-00905420-01005420-01105420-01205420-01305420-01605420-50005420-50105420-50195420-50205420-50295420-50305420-50395420-50405420-50595420-50605420-50795420-50895420-50905420-51195420-51405420-51495420-51505420-51905420-52005420-52395420-523H5420-52805420-52905420-53105420-53205420-53305420-53405420-53505420-53605420-53705420-53805420-53905420-54005420-54405420-54505420-54605420-55205420-55305420-5540