HATTORY-SEIKO 16A Exploded diagram Brand HATTORY-SEIKO Caliber 16A Size 5 1/2 Function Version Hands Stem 351-160 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery MovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO16A5 1/2