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Patek Steel UFO Automatic Backwind Watch Ref. 3580 with Blue Dial (New Arrival)

Patek Steel UFO Automatic Backwind Watch Ref. 3580 with Blue Dial (New Arrival)

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Patek Philippe Yellow Gold Pocket Watch with Guilloche Dial

Patek Philippe Yellow Gold Pocket Watch with Guilloche Dial

Patek Philippe Yellow Gold Pocket Watch with Guilloche Dial

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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 Rose Gold World Time Cloisonne Watch Ref. 5131 - The Keystone Watches

Patek Philippe Rose Gold World Time Cloisonne Watch Ref. 5131

Patek Philippe Rose Gold World Time Cloisonne Watch Ref. 5131

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Patek Philippe Annual Calendar Chronograph Watch Ref. 5960

Patek Philippe Annual Calendar Chronograph Watch Ref. 5960

Patek Philippe Annual Calendar Chronograph Watch Ref. 5960

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

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

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Patek Philippe White Gold Gondolo Ref. 5010

Patek Philippe White Gold Gondolo Ref. 5010

Patek Philippe White Gold Gondolo Ref. 5010

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Patek Philippe White Gold World Time Ref. 5110

Patek Philippe White Gold World Time Ref. 5110

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Patek Philippe - Patek Philippe White Gold Grand Complication Minute Repeater Watch Ref. 5213 - The Keystone Watches

Patek Philippe White Gold Grand Complication Minute Repeater Watch Ref. 5213

Patek Philippe White Gold Grand Complication Minute Repeater Watch Ref. 5213

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Patek Philippe White Gold Ellipse Ref. 3598

Patek Philippe White Gold Ellipse Ref. 3598

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Patek Philippe - Patek Philippe Platinum Perpetual Calendar Chronograph Ref. 5970 - The Keystone Watches

Patek Philippe Platinum Perpetual Calendar Chronograph Ref. 5970

Patek Philippe Platinum Perpetual Calendar Chronograph Ref. 5970

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Patek Philippe Yellow Gold Nautilus Ref. 3800 with Blue Diamond Dial

Patek Philippe Yellow Gold Nautilus Ref. 3800 with Blue Diamond Dial

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Patek Philippe - Patek Philippe Yellow Gold Calatrava Ref. 5022 - The Keystone Watches

Patek Philippe Yellow Gold Calatrava Ref. 5022

Patek Philippe Yellow Gold Calatrava Ref. 5022

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Patek Philippe Yellow Gold Golden Ellipse Ref. 3855

Patek Philippe Yellow Gold Golden Ellipse Ref. 3855

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Patek Philippe Rose Gold Perpetual Calendar Ref. 5940 (New Arrival)

Patek Philippe Rose Gold Perpetual Calendar Ref. 5940 (New Arrival)

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Patek Philippe Yellow Gold Calatrava Ref. 570 (New Arrival)

Patek Philippe Yellow Gold Calatrava Ref. 570 (New Arrival)

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

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

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Patek Philippe Yellow Gold Ellipse Ref. 3987 (New Arrival)

Patek Philippe Yellow Gold Ellipse Ref. 3987 (New Arrival)

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Patek Philippe White Gold Gondolo Ref. 3571 with Textured Blue Dial and JPE Bracelet

Patek Philippe White Gold Gondolo Ref. 3571 with Textured Blue Dial and JPE Bracelet

Patek Philippe White Gold Gondolo Ref. 3571 with Textured Blue Dial and JPE Bracelet

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Patek Philippe Steel Calatrava Ref. 3579 in Outstanding Original Condition

Patek Philippe Steel Calatrava Ref. 3579 in Outstanding Original Condition

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Patek Philippe Yellow Gold Nautilus Ref. 3800/5 with Factory Diamonds

Patek Philippe Yellow Gold Nautilus Ref. 3800/5 with Factory Diamonds

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Patek Philippe Platinum Perpetual Calendar Ref. 3940

Patek Philippe Platinum Perpetual Calendar Ref. 3940

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New Arrivals Preview
 
Rolex Yellow Gold Queen Midas Watch Ref. 4314 with Lapis and Diamond Dial (New Arrival)

Rolex Yellow Gold Queen Midas Watch Ref. 4314 with Lapis and Diamond Dial (New Arrival)

Rolex Yellow Gold Queen Midas Watch Ref. 4314 with Lapis and Diamond Dial (New Arrival)

$38,000 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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