You can secure protection for your design in other countries by claiming priority for a Monegasque application (within six months of filing) and opting for one of the following two methods:
National, by filing an application to register an industrial design directly with the intellectual property office in the country concerned.
International (the Hague system), by filing an application to register an industrial design internationally directly with the World Intellectual Property Organization (WIPO) (for up to 100 designs) for your selected countries. You do not need to have an industrial design registered in Monaco to do this.