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Patek White Gold Vintage Ellipse with Original Diamonds Ref. 4177

Patek White Gold Vintage Ellipse with Original Diamonds Ref. 4177

Patek White Gold Vintage Ellipse with Original Diamonds Ref. 4177

Sold Out

 
Patek Philippe - Patek Philippe White Gold Calatrava Ref. 3468 with Original Warranty - The Keystone Watches

Patek Philippe White Gold Calatrava Ref. 3468 with Original Warranty

Patek Philippe White Gold Calatrava Ref. 3468 with Original Warranty

Sold Out

 
Patek Philippe Rose Gold Nautilus Chronograph Watch Ref. 5980, Tiffany & Co., 2018

Patek Philippe Rose Gold Nautilus Chronograph Watch Ref. 5980, Tiffany & Co., 2018

Patek Philippe Rose Gold Nautilus Chronograph Watch Ref. 5980, Tiffany & Co., 2018

Sold Out

 
Patek Philippe White Gold Perpetual Calendar Watch Ref. 5040

Patek Philippe White Gold Perpetual Calendar Watch Ref. 5040

Patek Philippe White Gold Perpetual Calendar Watch Ref. 5040

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Nautilus Watch Ref. 3700 - The Keystone Watches

Patek Philippe Yellow Gold Nautilus Watch Ref. 3700

Patek Philippe Yellow Gold Nautilus Watch Ref. 3700

Sold Out

 
Patek Philippe Yellow Gold Neptune Moonphase Power Reserve Ref. 5085

Patek Philippe Yellow Gold Neptune Moonphase Power Reserve Ref. 5085

Patek Philippe Yellow Gold Neptune Moonphase Power Reserve Ref. 5085

Sold Out

 
Patek Philippe Yellow Gold World Time Watch Ref. 1415

Patek Philippe Yellow Gold World Time Watch Ref. 1415

Patek Philippe Yellow Gold World Time Watch Ref. 1415

"Price upon request"
 

Patek Philippe White Gold Annual Calendar Ref. 5146

Patek Philippe White Gold Annual Calendar Ref. 5146

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Patek Philippe White Gold Annual Calendar Ref. 5146

Patek Philippe White Gold Annual Calendar Ref. 5146

Patek Philippe White Gold Annual Calendar Ref. 5146

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Patek Philippe - Patek Philippe Yellow Gold Vintage Watch Ref. 3319 Retailed by Tiffany & Co. - The Keystone Watches

Patek Philippe Yellow Gold Vintage Watch Ref. 3319 Retailed by Tiffany & Co.

Patek Philippe Yellow Gold Vintage Watch Ref. 3319 Retailed by Tiffany & Co.

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Nautilus Original Diamonds Watch Ref. 3900 - The Keystone Watches

Patek Philippe Yellow Gold Nautilus Original Diamonds Watch Ref. 3900

Patek Philippe Yellow Gold Nautilus Original Diamonds Watch Ref. 3900

Sold Out

 
Patek Philippe White Gold Ellipse Diamond Ref. 3377

Patek Philippe White Gold Ellipse Diamond Ref. 3377

Patek Philippe White Gold Ellipse Diamond Ref. 3377

Sold Out

 
Patek Philippe White Gold Gondolo Ref. 5010

Patek Philippe White Gold Gondolo Ref. 5010

Patek Philippe White Gold Gondolo Ref. 5010

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Annual Calendar Watch Ref. 5035J - The Keystone Watches

Patek Philippe Yellow Gold Annual Calendar Watch Ref. 5035J

Patek Philippe Yellow Gold Annual Calendar Watch Ref. 5035J

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Patek Philippe White Gold Backwind Calatrava Ref. 3563 with Original Warranty

Patek Philippe White Gold Backwind Calatrava Ref. 3563 with Original Warranty

Patek Philippe White Gold Backwind Calatrava Ref. 3563 with Original Warranty

Sold Out

 

Patek Philippe Yellow Gold Gondolo Ref. 5014

Patek Philippe Yellow Gold Gondolo Ref. 5014

Sold Out

 
Patek Philippe - Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 3970 (New Arrival) - The Keystone Watches

Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 3970 (New Arrival)

Patek Philippe White Gold Perpetual Calendar Chronograph Ref. 3970 (New Arrival)

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Patek Philippe Yellow Gold Ellipse Ref. 3738

Patek Philippe Yellow Gold Ellipse Ref. 3738

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Perpetual Calendar Minute Repeater Ref. 5013 - The Keystone Watches

Patek Philippe Yellow Gold Perpetual Calendar Minute Repeater Ref. 5013

Patek Philippe Yellow Gold Perpetual Calendar Minute Repeater Ref. 5013

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Patek Philippe - Patek Philippe Yellow Gold Nautilus Ref. 3800 with Diamond Bezel and Ceramic Dial - The Keystone Watches

Patek Philippe Yellow Gold Nautilus Ref. 3800 with Diamond Bezel and Ceramic Dial

Patek Philippe Yellow Gold Nautilus Ref. 3800 with Diamond Bezel and Ceramic Dial

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Watch Ref. 4890 - The Keystone Watches

Patek Philippe Yellow Gold Watch Ref. 4890

Patek Philippe Yellow Gold Watch Ref. 4890

Sold Out

 
Patek Philippe - Patek Philippe Yellow Gold Mini Calatrava Ref. 3276 - The Keystone Watches

Patek Philippe Yellow Gold Mini Calatrava Ref. 3276

Patek Philippe Yellow Gold Mini Calatrava Ref. 3276

Sold Out

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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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