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Patek Philippe Yellow Gold Nautilus Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Watch Ref. 3800

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Patek Philippe Platinum Nautilus Watch Ref. 3800 with Original Box and Papers

Patek Philippe Platinum Nautilus Watch Ref. 3800 with Original Box and Papers

Patek Philippe Platinum Nautilus Watch Ref. 3800 with Original Box and Papers

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Patek Phillipe Yellow Gold Mini Nautilus Ref. 4700

Patek Phillipe Yellow Gold Mini Nautilus Ref. 4700

Patek Phillipe Yellow Gold Mini Nautilus Ref. 4700

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Patek Philippe White Gold Chronograph Diamond Watch Ref. 5071 (New Arrival)

Patek Philippe White Gold Chronograph Diamond Watch Ref. 5071 (New Arrival)

Patek Philippe White Gold Chronograph Diamond Watch Ref. 5071 (New Arrival)

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Patek Philippe Yellow Gold Calatrava Watch Ref. 1578 (New Arrival)

Patek Philippe Yellow Gold Calatrava Watch Ref. 1578 (New Arrival)

Patek Philippe Yellow Gold Calatrava Watch Ref. 1578 (New Arrival)

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Patek Philippe Rose Gold Cushion Watch Ref. 2444 (New Arrival)

Patek Philippe Rose Gold Cushion Watch Ref. 2444 (New Arrival)

Patek Philippe Rose Gold Cushion Watch Ref. 2444 (New Arrival)

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Patek Philippe Yellow Gold Nautilus Ref. 3800 (New Arrival)

Patek Philippe Yellow Gold Nautilus Ref. 3800 (New Arrival)

Patek Philippe Yellow Gold Nautilus Ref. 3800 (New Arrival)

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Patek Steel Calatrava Ref. 3718, Made for 150th Anniversary

Patek Steel Calatrava Ref. 3718, Made for 150th Anniversary

Patek Steel Calatrava Ref. 3718, Made for 150th Anniversary

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Patek Philippe White Gold Ellipse Ref. 3589

Patek Philippe White Gold Ellipse Ref. 3589

Patek Philippe White Gold Ellipse Ref. 3589

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Patek Philippe White Gold Golden Ellipse Watch Ref. 3644 on Chain JPE Band (New Arrival)

Patek Philippe White Gold Golden Ellipse Watch Ref. 3644 on Chain JPE Band (New Arrival)

Patek Philippe White Gold Golden Ellipse Watch Ref. 3644 on Chain JPE Band (New Arrival)

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Patek Philippe Rose Gold Split Seconds Perpetual Calendar Chronograph Ref. 5204R

Patek Philippe Rose Gold Split Seconds Perpetual Calendar Chronograph Ref. 5204R

Patek Philippe Rose Gold Split Seconds Perpetual Calendar Chronograph Ref. 5204R

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Patek Philippe Rose Gold Calatrava Watch Ref. 3796

Patek Philippe Rose Gold Calatrava Watch Ref. 3796

Patek Philippe Rose Gold Calatrava Watch Ref. 3796

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Patek Philippe - Patek Philippe Steel Automatic Backwind UFO Watch Ref. 3580 - The Keystone Watches

Patek Philippe Steel Automatic Backwind UFO Watch Ref. 3580

Patek Philippe Steel Automatic Backwind UFO Watch Ref. 3580

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Patek Phillipe Yellow Gold Gondolo Watch Ref. 3842

Patek Phillipe Yellow Gold Gondolo Watch Ref. 3842

Patek Phillipe Yellow Gold Gondolo Watch Ref. 3842

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Patek Philippe - Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 5270G - The Keystone Watches

Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 5270G

Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 5270G

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Patek Philippe White Gold Calatrava Ref. 5006 with Factory Dialmonds

Patek Philippe White Gold Calatrava Ref. 5006 with Factory Dialmonds

Patek Philippe White Gold Calatrava Ref. 5006 with Factory Dialmonds

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Patek Philippe - Patek Philippe Platinum Calatrava Watch Ref. 5196 - The Keystone Watches

Patek Philippe Platinum Calatrava Watch Ref. 5196

Patek Philippe Platinum Calatrava Watch Ref. 5196

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Patek Philippe White Gold Calatrava Officers Watch Ref. 4860

Patek Philippe White Gold Calatrava Officers Watch Ref. 4860

Patek Philippe White Gold Calatrava Officers Watch Ref. 4860

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Patek Philippe Platinum Gondolo Watch Ref. 5098

Patek Philippe Platinum Gondolo Watch Ref. 5098

Patek Philippe Platinum Gondolo Watch Ref. 5098

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Patek Philippe Yellow Gold Nautilus Diamond Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Diamond Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Diamond Watch Ref. 3800

Sold Out

 
Patek Philippe White Gold Ellipse Watch Ref. 3589

Patek Philippe White Gold Ellipse Watch Ref. 3589

Patek Philippe White Gold Ellipse Watch Ref. 3589

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Aquanaut Watch Ref. 5066 (New Arrival) - The Keystone Watches

Patek Philippe Yellow Gold Aquanaut Watch Ref. 5066 (New Arrival)

Patek Philippe Yellow Gold Aquanaut Watch Ref. 5066 (New Arrival)

Sold Out

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New Arrivals Preview
 
Audemars Piguet Perpetual Calendar Minute Repeater Murat Pocket Watch (New Arrival)

Audemars Piguet Perpetual Calendar Minute Repeater Murat Pocket Watch (New Arrival)

Audemars Piguet Perpetual Calendar Minute Repeater Murat Pocket Watch (New Arrival)

$275,000 USD
 
Audemars Piguet John Shaeffer Star Wheel Minute Repeater Ref. 25881OR (New Arrival)

Audemars Piguet John Shaeffer Star Wheel Minute Repeater Ref. 25881OR (New Arrival)

Audemars Piguet John Shaeffer Star Wheel Minute Repeater Ref. 25881OR (New Arrival)

$300,000 USD
 
Patek Philippe White Gold Baguette Diamond Watch Ref. 3540 (New Arrival)

Patek Philippe White Gold Baguette Diamond Watch Ref. 3540 (New Arrival)

Patek Philippe White Gold Baguette Diamond Watch Ref. 3540 (New Arrival)

$30,000 USD
 
Vacheron Constantin Yellow Gold Chronograph Watch Ref. 4178 with Important Provenance (New Arrival)

Vacheron Constantin Yellow Gold Chronograph Watch Ref. 4178 with Important Provenance (New Arrival)

Vacheron Constantin Yellow Gold Chronograph Watch Ref. 4178 with Important Provenance (New Arrival)

$60,000 USD
 
Breguet Cushion Shaped Diver 200m Watch (New Arrival)

Breguet Cushion Shaped Diver 200m Watch (New Arrival)

Breguet Cushion Shaped Diver 200m Watch (New Arrival)

$58,000 USD
 
Audemars Piguet White Gold Rectangular Watch with Lapis Watch (New Arrival)

Audemars Piguet White Gold Rectangular Watch with Lapis Watch (New Arrival)

Audemars Piguet White Gold Rectangular Watch with Lapis Watch (New Arrival)

$18,000 USD
 
Cartier Yellow Gold Tank Normale Bracelet Watch  Ref. 78092 (New Arrival)

Cartier Yellow Gold Tank Normale Bracelet Watch Ref. 78092 (New Arrival)

Cartier Yellow Gold Tank Normale Bracelet Watch Ref. 78092 (New Arrival)

$36,000 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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