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

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

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

$120,000 USD
 
Breguet Yellow Gold Empire Watch, Circa 1955

Breguet Yellow Gold Empire Watch, Circa 1955

Breguet Yellow Gold Empire Watch, Circa 1955

$97,500 USD
 
Breguet Souscription Grand Complication Set Watch and Pocket Watch, Circa 1992

Breguet Souscription Grand Complication Set Watch and Pocket Watch, Circa 1992

Breguet Souscription Grand Complication Set Watch and Pocket Watch, Circa 1992

$225,000 USD
 
Omega Yellow Gold Sculptural Watch Ref. 8305, Designed by Andrew Grima for Jeux dOr Collection

Omega Yellow Gold Sculptural Watch Ref. 8305, Designed by Andrew Grima for Jeux dOr Collection

Omega Yellow Gold Sculptural Watch Ref. 8305, Designed by Andrew Grima for Jeux dOr Collection

$60,000 USD
 
Audemars Yellow Gold and Diamond Bracelet Watch Ref. 4207

Audemars Yellow Gold and Diamond Bracelet Watch Ref. 4207

Audemars Yellow Gold and Diamond Bracelet Watch Ref. 4207

$58,000 USD
 
IWC Yellow Gold Turquoise & Diamond Watch

IWC Yellow Gold Turquoise & Diamond Watch

IWC Yellow Gold Turquoise & Diamond Watch

$65,000 USD
 
Girard Perregaux White Gold Triple Bridge Tourbillon Ref. 99350 with Unique Cloisonne Dial

Girard Perregaux White Gold Triple Bridge Tourbillon Ref. 99350 with Unique Cloisonne Dial

Girard Perregaux White Gold Triple Bridge Tourbillon Ref. 99350 with Unique Cloisonne Dial

$85,000 USD
 
IWC Platinum Il Destriero Scafusia Grand Complication Bracelet Watch

IWC Platinum Il Destriero Scafusia Grand Complication Bracelet Watch

IWC Platinum Il Destriero Scafusia Grand Complication Bracelet Watch

"Price upon request"
 
Vacheron Constantin White Gold Phidias Ref. 48010 with Pave Diamond Dial

Vacheron Constantin White Gold Phidias Ref. 48010 with Pave Diamond Dial

Vacheron Constantin White Gold Phidias Ref. 48010 with Pave Diamond Dial

$18,500 USD
 
Ulysse Nardin Yellow Gold San Marco Enamel Watch Ref. 131-77-9

Ulysse Nardin Yellow Gold San Marco Enamel Watch Ref. 131-77-9

Ulysse Nardin Yellow Gold San Marco Enamel Watch Ref. 131-77-9

$16,000 USD
 
Gerald Genta White Gold Skeleton Octagonal Watch Ref. G2099

Gerald Genta White Gold Skeleton Octagonal Watch Ref. G2099

Gerald Genta White Gold Skeleton Octagonal Watch Ref. G2099

$18,500 USD
 
Vacheron Constantin Ladies Skeleton Diamond Ref. 43502/1

Vacheron Constantin Ladies Skeleton Diamond Ref. 43502/1

Vacheron Constantin Ladies Skeleton Diamond Ref. 43502/1

$15,000 USD
 
Richard Mille Olympic-Worn, Yohan Blake Tourbillon RM38 Prototype

Richard Mille Olympic-Worn, Yohan Blake Tourbillon RM38 Prototype

Richard Mille Olympic-Worn, Yohan Blake Tourbillon RM38 Prototype

$1,500,000 USD
 
IWC White Gold Sapphire and Diamond Cover Watch

IWC White Gold Sapphire and Diamond Cover Watch

IWC White Gold Sapphire and Diamond Cover Watch

$7,800 USD
 
Vacheron Constantin White Gold Pocket Watch

Vacheron Constantin White Gold Pocket Watch

Vacheron Constantin White Gold Pocket Watch

$7,500 USD
 
IWC White Gold Yacht Club Onyx & Diamond Watch

IWC White Gold Yacht Club Onyx & Diamond Watch

IWC White Gold Yacht Club Onyx & Diamond Watch

$45,000 USD
 
Bulgari Monete Ancient Coin Ring from 4th Century BC (Objet)

Bulgari Monete Ancient Coin Ring from 4th Century BC (Objet)

Bulgari Monete Ancient Coin Ring from 4th Century BC (Objet)

$8,000 USD
 
Breguet White Gold Classique Watch Ref. 5197

Breguet White Gold Classique Watch Ref. 5197

Breguet White Gold Classique Watch Ref. 5197

$12,000 USD
 
Gubelin Yellow Gold, Sapphire and Diamond Cover Watch

Gubelin Yellow Gold, Sapphire and Diamond Cover Watch

Gubelin Yellow Gold, Sapphire and Diamond Cover Watch

$16,500 USD
 
Tiffany & Co Yellow Gold and Lapis Cufflinks (Objet)

Tiffany & Co Yellow Gold and Lapis Cufflinks (Objet)

Tiffany & Co Yellow Gold and Lapis Cufflinks (Objet)

$1,500 USD
 
Vacheron Constantin Yellow Gold Coin Watch Ref. 4928 on a Bracelet

Vacheron Constantin Yellow Gold Coin Watch Ref. 4928 on a Bracelet

Vacheron Constantin Yellow Gold Coin Watch Ref. 4928 on a Bracelet

$13,000 USD
 
Corum Yellow Gold Rolls Royce Mechanical Watch Ref. 55595

Corum Yellow Gold Rolls Royce Mechanical Watch Ref. 55595

Corum Yellow Gold Rolls Royce Mechanical Watch Ref. 55595

$8,500 USD
New Arrivals Preview
 
Rolex Steel Submariner Ref. 5513 with Nice Patina, Circa 1984 (New Arrival)

Rolex Steel Submariner Ref. 5513 with Nice Patina, Circa 1984 (New Arrival)

Rolex Steel Submariner Ref. 5513 with Nice Patina, Circa 1984 (New Arrival)

$11,200 USD
 
Vacheron Constantin Two-Tone Ref. 222 with Rare Saudi Arabia Dial (New Arrival)

Vacheron Constantin Two-Tone Ref. 222 with Rare Saudi Arabia Dial (New Arrival)

Vacheron Constantin Two-Tone Ref. 222 with Rare Saudi Arabia Dial (New Arrival)

$48,000 USD
 
Patek Philippe White Gold Square Watch Ref. 4222 (New Arrival)

Patek Philippe White Gold Square Watch Ref. 4222 (New Arrival)

Patek Philippe White Gold Square Watch Ref. 4222 (New Arrival)

$14,500 USD
 
Patek Philippe White Gold Golden Ellipse Watch Ref. 3644 (New Arrival)

Patek Philippe White Gold Golden Ellipse Watch Ref. 3644 (New Arrival)

Patek Philippe White Gold Golden Ellipse Watch Ref. 3644 (New Arrival)

$15,500 USD
 
A. Lange & Sohne White Gold Grand Lange 1 Lange Luminous Ref. 115.028 (New Arrival)

A. Lange & Sohne White Gold Grand Lange 1 Lange Luminous Ref. 115.028 (New Arrival)

A. Lange & Sohne White Gold Grand Lange 1 Lange Luminous Ref. 115.028 (New Arrival)

$31,500 USD
 
Cartier Yellow Gold Secret Hidden Shutter Watch, European Watch & Clock (New Arrival)

Cartier Yellow Gold Secret Hidden Shutter Watch, European Watch & Clock (New Arrival)

Cartier Yellow Gold Secret Hidden Shutter Watch, European Watch & Clock (New Arrival)

$28,000 USD
 
Patek Philippe Yellow Gold Ellipse Bracelet Watch Ref. 3838 (New Arrival)

Patek Philippe Yellow Gold Ellipse Bracelet Watch Ref. 3838 (New Arrival)

Patek Philippe Yellow Gold Ellipse Bracelet Watch Ref. 3838 (New Arrival)

$19,500 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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