Developed using eco-friendly sources, its renewable materials including Rizinus (castor oil) for its case, natural rubber for the strap and recycled PET bottles for its mutli-purpose pouch, make these modern creations not only clean and simple in design but considerate to the world we live in.Specifications:- Movement (manufacture. Ref.) : RONDA 513.S- Movement (type) : Quartz- Case size/diameter (mm) : 41.00- Case material : based on renewable raw material- Case back : Pressed caseback- Crown Regular : Gasket- Crystal/Glass material Hardened Mineral- Water resistance (m/ft/atm : 30/100/3- Strap/Bracelet material : Natural rubber based- Strap/Bracelet finishing : Brushed- Strap width at lug (mm) : 20.00- Origin : Swiss Made