Most watches that are changeable allow your to change the color of the bezel or perhaps the band. Not Swiss company, Voltime
, their watches let you swap out or flip over the whole watch. The Voltime models have a base which can hold several removable and reversible modules. Their website features a watch configurator that lets you select your band and module. Their latest model is this stainless steel two-sided chronograph which has an ETA quartz chronograph movement with 60-seconds, 1/10 second and 30-minute indicators. The module can be set in your choice of diamonds, peridots, orange topazes or blue or pink sapphires.