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Patek Philippe Rose Gold Gondolo Gemma Ref. 4980

Patek Philippe Rose Gold Gondolo Gemma Ref. 4980

Patek Philippe Rose Gold Gondolo Gemma Ref. 4980

$10,800 USD
 
Patek Philippe White Gold Baguette Bezel Watch Ref. 3357/2

Patek Philippe White Gold Baguette Bezel Watch Ref. 3357/2

Patek Philippe White Gold Baguette Bezel Watch Ref. 3357/2

$19,500 USD
 
Patek Philippe Yellow Gold Calatrava Ref. 3440 on Gey Freres Band

Patek Philippe Yellow Gold Calatrava Ref. 3440 on Gey Freres Band

Patek Philippe Yellow Gold Calatrava Ref. 3440 on Gey Freres Band

$19,500 USD
 
Patek Philippe Steel 5711 First Serial 2006 Complete Retail Ready

Patek Philippe Steel 5711 First Serial 2006 Complete Retail Ready

Patek Philippe Steel 5711 First Serial 2006 Complete Retail Ready

Sold Out

 
Patek Philippe Yellow Gold Perpetual Calendar Chronograph Watch Ref. 3970

Patek Philippe Yellow Gold Perpetual Calendar Chronograph Watch Ref. 3970

Patek Philippe Yellow Gold Perpetual Calendar Chronograph Watch Ref. 3970

$170,000 USD
 
Patek White Gold Calatrava Watch Ref. 570

Patek White Gold Calatrava Watch Ref. 570

Patek White Gold Calatrava Watch Ref. 570

Sold Out

 
Patek Philippe Rose Gold Calatrava Watch Ref. 96

Patek Philippe Rose Gold Calatrava Watch Ref. 96

Patek Philippe Rose Gold Calatrava Watch Ref. 96

Sold Out

 
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
 
Patek Philippe White Gold Calatrava Watch Ref. 3445 in Top Condition

Patek Philippe White Gold Calatrava Watch Ref. 3445 in Top Condition

Patek Philippe White Gold Calatrava Watch Ref. 3445 in Top Condition

Sold Out

 
Patek Philippe Platinum Perpetual Calendar Chronograph Watch Ref. 5271 with Baguette Diamonds

Patek Philippe Platinum Perpetual Calendar Chronograph Watch Ref. 5271 with Baguette Diamonds

Patek Philippe Platinum Perpetual Calendar Chronograph Watch Ref. 5271 with Baguette Diamonds

"Price upon request"
 
Patek Philippe Rose Gold Perpetual Calendar Ref. 5040

Patek Philippe Rose Gold Perpetual Calendar Ref. 5040

Patek Philippe Rose Gold Perpetual Calendar Ref. 5040

Sold Out

 
Patek Philippe - Patek Philiipe Yellow Gold Pepita Watch Ref. 4121 - The Keystone Watches

Patek Philiipe Yellow Gold Pepita Watch Ref. 4121

Patek Philiipe Yellow Gold Pepita Watch Ref. 4121

$55,000 USD
 
Patek Philippe Yellow Gold Calatrava Ref. 2494

Patek Philippe Yellow Gold Calatrava Ref. 2494

Patek Philippe Yellow Gold Calatrava Ref. 2494

Sold Out

 
Patek Philiipe White Gold Pocket Watch Ref. 874

Patek Philiipe White Gold Pocket Watch Ref. 874

Patek Philiipe White Gold Pocket Watch Ref. 874

$23,500 USD
 
Patek Philippe Yellow Gold Watch Ref. 3479 Retailed by Beyer

Patek Philippe Yellow Gold Watch Ref. 3479 Retailed by Beyer

Patek Philippe Yellow Gold Watch Ref. 3479 Retailed by Beyer

Sold Out

 
Patek Philippe Rose Gold Calatrava Ref. 1471

Patek Philippe Rose Gold Calatrava Ref. 1471

Patek Philippe Rose Gold Calatrava Ref. 1471

Sold Out

 
Patek Philippe Yellow Gold Square Watch Ref. 3406 Retailed by Hausmann & Co.

Patek Philippe Yellow Gold Square Watch Ref. 3406 Retailed by Hausmann & Co.

Patek Philippe Yellow Gold Square Watch Ref. 3406 Retailed by Hausmann & Co.

Sold Out

 
Patek Philippe Platinum Calatrava Watch Ref. 96, Circa 1947

Patek Philippe Platinum Calatrava Watch Ref. 96, Circa 1947

Patek Philippe Platinum Calatrava Watch Ref. 96, Circa 1947

Sold Out

 
Patek Philippe Rose Gold Rare Handcraft Minute Repeater Watch Ref. 7000 with Cloisonne Swallows

Patek Philippe Rose Gold Rare Handcraft Minute Repeater Watch Ref. 7000 with Cloisonne Swallows

Patek Philippe Rose Gold Rare Handcraft Minute Repeater Watch Ref. 7000 with Cloisonne Swallows

"Price upon request"
 
Patek Phillipe Rose Gold Calatrava Cufflinks (Objet)

Patek Phillipe Rose Gold Calatrava Cufflinks (Objet)

Patek Phillipe Rose Gold Calatrava Cufflinks (Objet)

Sold Out

 
Patek Philippe Yellow Gold Nautilus Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Watch Ref. 3800

Patek Philippe Yellow Gold Nautilus Watch Ref. 3800

$78,000 USD
 

Patek Philippe Yellow Gold Pocket Watch Ref 770 Retailed by Gubelin

Patek Philippe Yellow Gold Pocket Watch Ref 770 Retailed by Gubelin

$7,800 USD
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New Arrivals Preview
 
Cartier Tank Coussin Bamboo Ref. 78102 (New Arrival)

Cartier Tank Coussin Bamboo Ref. 78102 (New Arrival)

Cartier Tank Coussin Bamboo Ref. 78102 (New Arrival)

$125,000 USD
 
Cartier Tank Allongee Elongated, Circa 1940 (New Arrival)

Cartier Tank Allongee Elongated, Circa 1940 (New Arrival)

Cartier Tank Allongee Elongated, Circa 1940 (New Arrival)

$62,000 USD
 
Patek Philippe White Gold Rectangular Art Deco Watch (New Arrival)

Patek Philippe White Gold Rectangular Art Deco Watch (New Arrival)

Patek Philippe White Gold Rectangular Art Deco Watch (New Arrival)

$55,000 USD
 
Cartier Platinum Tank Watch Ref. 16111 (New Arrival)

Cartier Platinum Tank Watch Ref. 16111 (New Arrival)

Cartier Platinum Tank Watch Ref. 16111 (New Arrival)

$21,000 USD
 
Patek Philippe Yellow Gold Chronograph Watch Ref. 591, Incredible Original Condition (New Arrival)

Patek Philippe Yellow Gold Chronograph Watch Ref. 591, Incredible Original Condition (New Arrival)

Patek Philippe Yellow Gold Chronograph Watch Ref. 591, Incredible Original Condition (New Arrival)

$175,000 USD
 
Patek Philippe Yellow Gold Enamel Dial Calatrava Watch Ref. 2526 (New Arrival)

Patek Philippe Yellow Gold Enamel Dial Calatrava Watch Ref. 2526 (New Arrival)

Patek Philippe Yellow Gold Enamel Dial Calatrava Watch Ref. 2526 (New Arrival)

$70,000 USD
 
Breguet Platinum Skeleton Tourbillon Watch Ref. 3355 (New Arrival)

Breguet Platinum Skeleton Tourbillon Watch Ref. 3355 (New Arrival)

Breguet Platinum Skeleton Tourbillon Watch Ref. 3355 (New Arrival)

$67,500 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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