It has an extra thick mineral crystal. Here is the specs:
DETAILS --- Light-Powered (Eco-Drive) 6-month power reserve --- Diameter of the case is 52 mm x 47 mm (incl. crown) --- HACK feature --- 5 Times the shock resistance of normal watches --- EXTRA THICK Mineral crystal --- Black multi-layered plastic with luminous inserts over ultra-polished silicon solar cells dial with luminous at each hour --- Quartz caliber 872 --- Special design Separated case, shock-resistant bezel, dual stainless steel dial --- Stainless steel case and duplicated rubber case --- Screw lock crown covered by a hard rubber protector --- Anti-magnetic 16000 --- 200m water resistant ---Black leather strap (the strap has some damage , due to the long time storage) , ---Housing made of solid matte stainless steel with plastic ---Date display at 3 ---On the Dial, It signs " CITIZEN Eco-Drive WR 200" ---On the BACK, It signs " CITIZEN Eco-Drive B872-H21947KA ANTIMAG-16000 JAPANGN-4W-U PLATICS CITIZEN WATCH CO. W.R. 20 BAR