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Patek Philippe - Patek Philippe Rose Gold World Time Watch Ref. 5230 - The Keystone Watches

Patek Philippe Rose Gold World Time Watch Ref. 5230

Patek Philippe Rose Gold World Time Watch Ref. 5230

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Patek Philippe - Patek Philippe White Gold Chronograph Watch Ref. 5170 - The Keystone Watches

Patek Philippe White Gold Chronograph Watch Ref. 5170

Patek Philippe White Gold Chronograph Watch Ref. 5170

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Patek Philippe - Patek Philippe Rose Gold Perpetual Calendar Chronograph Watch Ref. 5970 - The Keystone Watches

Patek Philippe Rose Gold Perpetual Calendar Chronograph Watch Ref. 5970

Patek Philippe Rose Gold Perpetual Calendar Chronograph Watch Ref. 5970

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Patek Philippe - Patek Philippe Yellow Gold Ellipse Automatic Watch Ref. 3738 - The Keystone Watches

Patek Philippe Yellow Gold Ellipse Automatic Watch Ref. 3738

Patek Philippe Yellow Gold Ellipse Automatic Watch Ref. 3738

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Patek Philippe - Patek Philippe Platinum Chronograph Diamond Watch Ref. 5170 - The Keystone Watches

Patek Philippe Platinum Chronograph Diamond Watch Ref. 5170

Patek Philippe Platinum Chronograph Diamond Watch Ref. 5170

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Patek Philippe - Patek Philippe Rose Gold Perpetual Calendar Split Watch Ref. 5004 - The Keystone Watches

Patek Philippe Rose Gold Perpetual Calendar Split Watch Ref. 5004

Patek Philippe Rose Gold Perpetual Calendar Split Watch Ref. 5004

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Patek Philippe - Patek Philippe Rose Gold Aquanaut Diamond Watch Ref. 5167/300R - The Keystone Watches

Patek Philippe Rose Gold Aquanaut Diamond Watch Ref. 5167/300R

Patek Philippe Rose Gold Aquanaut Diamond Watch Ref. 5167/300R

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Patek Philippe - Patek Philippe Yellow Gold Nautilus Diamond Watch Ref. 3800 - The Keystone Watches

Patek Philippe Yellow Gold Nautilus Diamond Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Diamond Watch Ref. 3800

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Patek Philippe - Patek Philippe Yellow Gold Ref. 425, with U.S.A. Boxing Provenance - The Keystone Watches

Patek Philippe Yellow Gold Ref. 425, with U.S.A. Boxing Provenance

Patek Philippe Yellow Gold Ref. 425, with U.S.A. Boxing Provenance

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Patek Philippe - Patek Philippe White Gold Perpetual Calendar Watch Ref. 5320 - The Keystone Watches

Patek Philippe White Gold Perpetual Calendar Watch Ref. 5320

Patek Philippe White Gold Perpetual Calendar Watch Ref. 5320

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Patek Philippe - Patek Philippe White Gold Annual Calendar Blue Watch Ref. 5205 - The Keystone Watches

Patek Philippe White Gold Annual Calendar Blue Watch Ref. 5205

Patek Philippe White Gold Annual Calendar Blue Watch Ref. 5205

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Patek Philippe - Patek Philippe Rose Gold Nautilus Moonphase Watch Ref. 5712 - The Keystone Watches

Patek Philippe Rose Gold Nautilus Moonphase Watch Ref. 5712

Patek Philippe Rose Gold Nautilus Moonphase Watch Ref. 5712

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Patek Philippe - Patek Philippe White Gold Automatic Calatrava Watch Ref. 3445 - The Keystone Watches

Patek Philippe White Gold Automatic Calatrava Watch Ref. 3445

Patek Philippe White Gold Automatic Calatrava Watch Ref. 3445

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Patek Philippe - Patek Philippe Platinum Annual Calendar Chronograph Watch Ref. 5960 - The Keystone Watches

Patek Philippe Platinum Annual Calendar Chronograph Watch Ref. 5960

Patek Philippe Platinum Annual Calendar Chronograph Watch Ref. 5960

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Patek Philippe - Patek Philippe Steel Nautilus Watch Ref. 3900 - The Keystone Watches

Patek Philippe Steel Nautilus Watch Ref. 3900

Patek Philippe Steel Nautilus Watch Ref. 3900

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Patek Philippe - Patek Philippe Yellow Gold Bracelet Watch Ref. 3598 - The Keystone Watches

Patek Philippe Yellow Gold Bracelet Watch Ref. 3598

Patek Philippe Yellow Gold Bracelet Watch Ref. 3598

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Patek Philippe - Patek Philippe White Gold Nautilus Moonphase Watch Ref. 5712 - The Keystone Watches

Patek Philippe White Gold Nautilus Moonphase Watch Ref. 5712

Patek Philippe White Gold Nautilus Moonphase Watch Ref. 5712

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Patek Philippe - Patek Philippe White Gold Travel Time Watch Ref. 5110 with Original Box and Papers - The Keystone Watches

Patek Philippe White Gold Travel Time Watch Ref. 5110 with Original Box and Papers

Patek Philippe White Gold Travel Time Watch Ref. 5110 with Original Box and Papers

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Patek Philippe - Patek Philippe Steel Calatrava Watch Ref. 3466 - The Keystone Watches

Patek Philippe Steel Calatrava Watch Ref. 3466

Patek Philippe Steel Calatrava Watch Ref. 3466

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Patek Philippe - Patek Philippe Nautilus Moonphase Watch Ref. 5726 in Double Sealed and Unworn Condition - The Keystone Watches

Patek Philippe Nautilus Moonphase Watch Ref. 5726 in Double Sealed and Unworn Condition

Patek Philippe Nautilus Moonphase Watch Ref. 5726 in Double Sealed and Unworn Condition

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Patek Philippe - Patek Philippe Platinum Chronograph 175th Anniversary Watch Ref. 5975 in Double Sealed Condition - The Keystone Watches

Patek Philippe Platinum Chronograph 175th Anniversary Watch Ref. 5975 in Double Sealed Condition

Patek Philippe Platinum Chronograph 175th Anniversary Watch Ref. 5975 in Double Sealed Condition

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Patek Philippe - Patek Philippe Platinum Monopusher Split Seconds Chrono Ref. 5959, Double Sealed and Unworn - The Keystone Watches

Patek Philippe Platinum Monopusher Split Seconds Chrono Ref. 5959, Double Sealed and Unworn

Patek Philippe Platinum Monopusher Split Seconds Chrono Ref. 5959, Double Sealed and Unworn

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New Arrivals Preview
 
Cartier Platinum Tank A Guichet Ref. WGTA0236, 2025 Edition (New Arrival)

Cartier Platinum Tank A Guichet Ref. WGTA0236, 2025 Edition (New Arrival)

Cartier Platinum Tank A Guichet Ref. WGTA0236, 2025 Edition (New Arrival)

$150,000 USD
 
Patek Philippe White Gold Calatrava Watch Ref. 4189 (New Arrival)

Patek Philippe White Gold Calatrava Watch Ref. 4189 (New Arrival)

Patek Philippe White Gold Calatrava Watch Ref. 4189 (New Arrival)

$9,800 USD
 
Rolex Yellow Gold Day-Date Watch Ref. 1803 with Claw Dial (New Arrival)

Rolex Yellow Gold Day-Date Watch Ref. 1803 with Claw Dial (New Arrival)

Rolex Yellow Gold Day-Date Watch Ref. 1803 with Claw Dial (New Arrival)

$18,750 USD
 
Boucheron - Boucheron Yellow Gold Invisible Set Sapphire Watch (New Arrival) - The Keystone Watches

Boucheron Yellow Gold Invisible Set Sapphire Watch (New Arrival)

Boucheron Yellow Gold Invisible Set Sapphire Watch (New Arrival)

$9,500 USD
 
Rolex - Rolex Yellow Gold Cellini Watch Ref. 4014/8 with Orange Dial (New Arrival) - The Keystone Watches

Rolex Yellow Gold Cellini Watch Ref. 4014/8 with Orange Dial (New Arrival)

Rolex Yellow Gold Cellini Watch Ref. 4014/8 with Orange Dial (New Arrival)

$7,500 USD
 
Rolex Steel Submariner Ref. 5513 with Pumkin Lume (New Arrival)

Rolex Steel Submariner Ref. 5513 with Pumkin Lume (New Arrival)

Rolex Steel Submariner Ref. 5513 with Pumkin Lume (New Arrival)

$15,500 USD
 
Patek Philiipe White Gold Calatrava Watch Ref. 3919 (New Arrival)

Patek Philiipe White Gold Calatrava Watch Ref. 3919 (New Arrival)

Patek Philiipe White Gold Calatrava Watch Ref. 3919 (New Arrival)

$15,000 USD
Shop all New Arrivals Preview

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Guarantee

Our watches go through a rigorous authentication process in which seasoned experts examine and evaluate the watches. These experts have decades of experience and have authenticated thousands of watches in their lifetime. We guarantee every piece of the watches we offer are 100% authentic. 

CONTACT US

You can reach us by emailing hello@thekeystone.com or call 213-632-9061

We are based in West Hollywood, CA. Please contact us for appointments to view a watch in person. 

We are not authorized sellers of the brands listed on our site. We sell vintage and pre-owned product.

Stay in touch.

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