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Patek Philippe Platinum Perpetual Calendar Watch Ref. 5970 with Grey Dial and Red Hands

Patek Philippe Platinum Perpetual Calendar Watch Ref. 5970 with Grey Dial and Red Hands

Patek Philippe Platinum Perpetual Calendar Watch Ref. 5970 with Grey Dial and Red Hands

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Patek Philippe Platinum Perpetual Calendar Split Seconds Chronograph Ref. 5004P-047 with Unique Lucky 8 Dial

Patek Philippe Platinum Perpetual Calendar Split Seconds Chronograph Ref. 5004P-047 with Unique Lucky 8 Dial

Patek Philippe Platinum Perpetual Calendar Split Seconds Chronograph Ref. 5004P-047 with Unique Lucky 8 Dial

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Patek Philippe Platinum Minute Repeater Enamel Watch Ref. 5078 Box and Papers (New Arrival)

Patek Philippe Platinum Minute Repeater Enamel Watch Ref. 5078 Box and Papers (New Arrival)

Patek Philippe Platinum Minute Repeater Enamel Watch Ref. 5078 Box and Papers (New Arrival)

Sold Out

 
Cartier Yellow Gold Cloisonne Rooster Tortue Ref. 2496

Cartier Yellow Gold Cloisonne Rooster Tortue Ref. 2496

Cartier Yellow Gold Cloisonne Rooster Tortue Ref. 2496

$54,000 USD
 
Rolex White Gold Daytona Ref. 116599 (New Arrival)

Rolex White Gold Daytona Ref. 116599 (New Arrival)

Rolex White Gold Daytona Ref. 116599 (New Arrival)

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Cartier Platinum Santos Dumont Ref. WGSA0113 Complete Set with Orange Dial (New Arrival)

Cartier Platinum Santos Dumont Ref. WGSA0113 Complete Set with Orange Dial (New Arrival)

Cartier Platinum Santos Dumont Ref. WGSA0113 Complete Set with Orange Dial (New Arrival)

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Rolex White Gold Day-Date Ref. 118239 with Lapis Lazuli Dial

Rolex White Gold Day-Date Ref. 118239 with Lapis Lazuli Dial

Rolex White Gold Day-Date Ref. 118239 with Lapis Lazuli Dial

$60,000 USD
 
Patek Philippe White Gold Calatrava Ref. 5153

Patek Philippe White Gold Calatrava Ref. 5153

Patek Philippe White Gold Calatrava Ref. 5153

Sold Out

 
Cartier Platinum Tank Americaine Ref. WGTA0296

Cartier Platinum Tank Americaine Ref. WGTA0296

Cartier Platinum Tank Americaine Ref. WGTA0296

Sold Out

 
Patek Philippe Platinum Split Seconds Chronograph Watch Ref. 5951P

Patek Philippe Platinum Split Seconds Chronograph Watch Ref. 5951P

Patek Philippe Platinum Split Seconds Chronograph Watch Ref. 5951P

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A. Lange & Sohne - A. Lange & Sohne Platinum 1815 Tourbillon Watch Ref. 730.025 - The Keystone Watches

A. Lange & Sohne Platinum 1815 Tourbillon Watch Ref. 730.025

A. Lange & Sohne Platinum 1815 Tourbillon Watch Ref. 730.025

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Rolex White Gold GMT Master II Ref. 116759SARU Sapphire and Ruby Bezel with Pave Diamond Dial and Card (New Arrival)

Rolex White Gold GMT Master II Ref. 116759SARU Sapphire and Ruby Bezel with Pave Diamond Dial and Card (New Arrival)

Rolex White Gold GMT Master II Ref. 116759SARU Sapphire and Ruby Bezel with Pave Diamond Dial and Card (New Arrival)

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Patek Philippe World Time Flyback Chronograph Ref. 5935A-001 with Box and Papers (New Arrival)

Patek Philippe World Time Flyback Chronograph Ref. 5935A-001 with Box and Papers (New Arrival)

Patek Philippe World Time Flyback Chronograph Ref. 5935A-001 with Box and Papers (New Arrival)

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Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 5204 (New Arrival)

Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 5204 (New Arrival)

Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 5204 (New Arrival)

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A. Lange & Sohne White Gold Lange 1 Ref. 101.039 (New Arrival)

A. Lange & Sohne White Gold Lange 1 Ref. 101.039 (New Arrival)

A. Lange & Sohne White Gold Lange 1 Ref. 101.039 (New Arrival)

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Rolex White Gold GMT-Master II Ref. 116759SA (New Arrival)

Rolex White Gold GMT-Master II Ref. 116759SA (New Arrival)

Rolex White Gold GMT-Master II Ref. 116759SA (New Arrival)

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Patek Philippe White Gold Nautilus Watch Ref. 3800/130 with Baguette Diamond Bezel

Patek Philippe White Gold Nautilus Watch Ref. 3800/130 with Baguette Diamond Bezel

Patek Philippe White Gold Nautilus Watch Ref. 3800/130 with Baguette Diamond Bezel

"Price upon request"
 
Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307

Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307

Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307

$1,850,000 USD
 
Cartier Yellow Gold Pebble Watch Ref. WGPB0003

Cartier Yellow Gold Pebble Watch Ref. WGPB0003

Cartier Yellow Gold Pebble Watch Ref. WGPB0003

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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)

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Patek Philippe Platinum Perpetual Calendar Ref. 5496

Patek Philippe Platinum Perpetual Calendar Ref. 5496

Patek Philippe Platinum Perpetual Calendar Ref. 5496

Sold Out

 
Patek Philippe Rose Gold Perpetual Calendar Watch Ref. 5040

Patek Philippe Rose Gold Perpetual Calendar Watch Ref. 5040

Patek Philippe Rose Gold Perpetual Calendar Watch Ref. 5040

Sold Out

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New Arrivals Preview
 
Vacheron Constantin Two-Tone 222 with Emblem of Saudi Arabia (New Arrival

Vacheron Constantin Two-Tone 222 with Emblem of Saudi Arabia (New Arrival

Vacheron Constantin Two-Tone 222 with Emblem of Saudi Arabia (New Arrival

$55,000 USD
 
Rolex Yellow Gold SARU GMT-Master Watch Ref. 116748 (New Arrival)

Rolex Yellow Gold SARU GMT-Master Watch Ref. 116748 (New Arrival)

Rolex Yellow Gold SARU GMT-Master Watch Ref. 116748 (New Arrival)

$86,000 USD
 
Patek Philippe Rose Gold Top Hat Watch Ref. 1450 (New Arrival)

Patek Philippe Rose Gold Top Hat Watch Ref. 1450 (New Arrival)

Patek Philippe Rose Gold Top Hat Watch Ref. 1450 (New Arrival)

$14,000 USD
 
Audemars Piguet Round UFO-Style Bracelet Watch (New Arrival)

Audemars Piguet Round UFO-Style Bracelet Watch (New Arrival)

Audemars Piguet Round UFO-Style Bracelet Watch (New Arrival)

$10,500 USD
 
Patek Philippe Pink Gold Concealed Gay Freres Watch (New Arrival)

Patek Philippe Pink Gold Concealed Gay Freres Watch (New Arrival)

Patek Philippe Pink Gold Concealed Gay Freres Watch (New Arrival)

$29,500 USD
 
Patek Philippe Pink Gold Watch Ref. 2488 (New Arrival)

Patek Philippe Pink Gold Watch Ref. 2488 (New Arrival)

Patek Philippe Pink Gold Watch Ref. 2488 (New Arrival)

$17,500 USD
 
Cartier Yellow Gold Santos Ref. 81736781 with Sapphire Bezel and Bracelet (New Arrival)

Cartier Yellow Gold Santos Ref. 81736781 with Sapphire Bezel and Bracelet (New Arrival)

Cartier Yellow Gold Santos Ref. 81736781 with Sapphire Bezel and Bracelet (New Arrival)

$55,000 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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