Patek Philippe Beta 21 18K Gold Case ref 3603Elipse but squared ! This is a very cool and funky looking vintage Patek from the 1970s with a Golden Ellipse looking dial but a more square case. The watch houses a Beta 21 movement. In the early 60s, a number of prominent brands, including Rolex and Patek Philippe, collaborated on the development of what became known the Beta 21 movement at the Centre Electronique Horologer (CEH). By the end of the 1960s approximately 6000 Beta 21 movements had been