Seiko Caliber 8523 Technical informationWatches with the 8523 movement8523-00108523-00208523-00308523-00318523-00398523-00408523-00418523-00498523-00508523-00518523-00598523-00608523-00618523-00698523-00708523-00718523-00798523-00808523-00908523-01008523-01108523-01118523-01198523-01208523-01218523-01298523-01408523-01418523-01508523-015A8523-01608523-01618523-01708523-01808523-018A8523-018B8523-018C8523-018J8523-018K8523-018L8523-01908523-02008523-02108523-50008523-50018523-50098523-50108523-501A8523-50208523-50308523-50318523-503A8523-503J8523-50408523-504A8523-50508523-50518523-50608523-50618523-50708523-50718523-50798523-50808523-50818523-50908523-50918523-51008523-51018523-51108523-51118523-51198523-51208523-512A8523-51308523-5140