Product specs Drive system mechanical Radio wave automatic correction function none Expression analog Case stainless glass curve hardlex band material metal Band (adjust) Pin method Accuracy Daily difference +45 seconds ~ -35 seconds Specification 1 Number of stones: 24 stones 24 hour hand (dual time display function) Second hand stop function Specification 2 See-through back Screw back Double lock clasp Specification 3 Case size: Length 47.91mm x Width 39.38mm x Thickness 13.58mm