Watches are said to be co-branded when they share the brand of two separate entities. Many watches are co-branded with automobile companies, for example.
Automotive Watch Brands
Note that the Jaguar brand, currently part of Festina, is unrelated to the automobile maker.
collaborated on marketing with Lamborghini from 2009 to 2016 but did not produce any co-branded watches
watches are designed by the son of Lamborghini founder Ferrucio Lamborghini and use the brand's bull logo with permission but are not co-branded with the car maker.
Note that Porsche Design is not in itself a co-branding exercise; the Porsche Design company is unrelated to the famous automobile brand. However, there are many tie-ins, starting with the founder, Ferdinand Porsche. Recently, Porsche Design collaborated with Porsche for the Porsche Design Chronograph 911 Turbo S Exclusive Series.
Porsche Design watches have been produced by the following companies