Seiko Caliber 4N21 No technical information found for this movement.Watches with the 4N21 movement4N21-00104N21-00124N21-00204N21-00224N21-00304N21-00324N21-003S4N21-00404N21-00424N21-004S4N21-00504N21-00524N21-00604N21-00624N21-006S4N21-00704N21-00724N21-00804N21-00904N21-01004N21-01104N21-01204N21-01304N21-01404N21-01504N21-01604N21-01704N21-01804N21-018A4N21-01904N21-02004N21-02104N21-02204N21-02304N21-02504N21-02604N21-02704N21-02804N21-02904N21-03004N21-03104N21-03204N21-03304N21-03404N21-03504N21-035A4N21-03604N21-036A4N21-03704N21-03804N21-03904N21-039A4N21-039B4N21-04004N21-04104N21-04204N21-042A4N21-04304N21-04404N21-04504N21-04804N21-04904N21-05004N21-05104N21-05114N21-05204N21-05304N21-05404N21-054A4N21-05504N21-05604N21-05804N21-058A4N21-05904N21-06004N21-06104N21-06204N21-06304N21-06404N21-06504N21-06604N21-06704N21-06804N21-06904N21-07004N21-07204N21-07304N21-07404N21-07504N21-07604N21-08004N21-08104N21-08204N21-08504N21-08904N21-09004N21-09104N21-09204N21-09304N21-09404N21-09504N21-09604N21-09704N21-09804N21-09904N21-10004N21-10304N21-10404N21-10504N21-10704N21-10904N21-11004N21-11204N21-11304N21-11404N21-11504N21-11604N21-11704N21-11804N21-11904N21-12004N21-50004N21-50024N21-50104N21-50124N21-50204N21-50224N21-50304N21-50324N21-50404N21-50504N21-50804N21-50904N21-51204N21-51504N21-51604N21-51704N21-51804N21-51904N21-52004N21-52104N21-52204N21-52304N21-52404N21-52504N21-52604N21-52704N21-52804N21-52904N21-53004N21-53104N21-53204N21-53304N21-53404N21-53504N21-53604N21-53704N21-53804N21-53904N21-54104N21-54304N21-54404N21-54504N21-54604N21-54804N21-5520