Building the Patek Philippe Grandmaster Chime Ref. 5175R Watch Here’s a beautiful behind the scenes look at Patek Philippe’s most complicated watch: the Grandmaster Chime Ref. 5175R. It took 7 years to develop, 2 years to produce, has 20 complications, 1,366 parts, and costs $2.5 million. And I’m pretty sure the man assembling the inner movement by hand is a goddamn wizard.