About Us | The Keystone Watches


The Keystone is focused on bringing customers unique timepieces, intriguing stories and an unparalleled experience in acquiring and engaging with vintage watches. We are dedicated to helping our customers further their watch knowledge and find the pieces that excite them. Whether you are looking to purchase your first watch or seeking the next rare piece for your collection, The Keystone is here to help.

We are located in Beverly Hills, CA and available by appointment. To schedule an appointment, please reach out by email at or by calling (213)-632-9061



Justin Gruenberg





Born in Los Angeles, CA, Justin moved to New York to complete a degree in Media Studies at Eugene Lang College at the New School. After graduating, Justin moved back to Los Angeles to join his father's watch business in Beverly Hills. He continues to play a role there while working as director at The Keystone. When he is not traveling the world searching for rare, vintage timepieces he enjoys sourcing unusual mid-century design items. His current favorite watch is a 1970’s Jumbo Royal Oak.


Max Abbott





Max grew up outside Philadelphia, PA before moving to New York to complete a major in Design & Management at Parsons School of Design. After honing his skills in retail marketing and content production at Anthropologie, Max moved to Los Angeles where he is now the co-founder and head of marketing at The Keystone. His favorite watches are vintage Rolex Submariners and Patek Philippe Calatravas.


Our Approach

Classic watches are relevant forever. We offer quality designs and styles that don’t go out of style; we want you to be happy with your watch for years to come. 

Our Brands

At The Keystone, we hand pick pieces from brands that have a long history in fine watchmaking. Brands that we offer, like Rolex, Patek Philippe, Audemars Piguet, and Panerai have been creating the world’s best time pieces for more than a century and we stand by their quality. 


Our specialists guarantee what you are buying is the real thing or your money back. With years of experience and knowledge, each of our pieces is authenticated and thoroughly inspected before being shipped. Each timepiece comes with our guaranteed certificate of authenticity. See our guarantee.


The Keystone provides a one-year warranty on all mechanical aspects of the watch. Read more about the warranty here.

We’re Here

If you are not happy with your purchase, returns are free & easy. Read more about our return policy here.

Chrono24 Trusted Seller


Patek Philippe 570 on Hodinkee