Movement: Swiss Ronda 5050B Quartz Movement Functions: Hours, Minutes, Sec, Big Date, Chronograph Dimensions : Dia 51mm x Ht 39.5x 13mm Thk Material : 1 piece forged case construction, solid 316 stainless steel Back : Display Case back with detail Engraving at case rims Crown : One-piece Pull out crown with o ring Crystal: Sapphire Crystal Water-resistant