HATTORY-PULSAR Y590A Exploded diagram Brand HATTORY-PULSAR Caliber Y590A Size 5 1/2 Function o. SC Version Hands 0.45x0.90 Stem 354-705 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery 364 MovementsArtno.brandcaliberSizehandsfunctionspecial161620HATTORY-PULSARY590A5 1/20.45x0.90o. SC Watchparts Part NocaliberdescriptionoriginalArtno.401Y590Winding stem03547059840354705401Y590Winding stem035470198403547014000Y590Electronic module =Seiko 54204001-378984040013784060Y590Coil -red4002-70598404002705