Casio originally offered the Casio Duro (MDV 106) model, which earned the nickname Marlin due to the presence of an fish illustration on the dial and the swordfish-like impression on the caseback. These symbols have been removed from the revamped Casio Duro models which are also offered in new colour options including the popular red-blue Pepsi combination on the bezel, along with a black-blue and full green one.