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A. Lange & Sohne - A. Lange & Sohne Platinum Datograph Watch Ref. 403.035 - The Keystone Watches

A. Lange & Sohne Platinum Datograph Watch Ref. 403.035

A. Lange & Sohne Platinum Datograph Watch Ref. 403.035

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Double Split Watch Ref. 404.035 - The Keystone Watches

A. Lange & Sohne Platinum Double Split Watch Ref. 404.035

A. Lange & Sohne Platinum Double Split Watch Ref. 404.035

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Grand Lange 1 Lumen 117.035 - The Keystone Watches

A. Lange & Sohne Platinum Grand Lange 1 Lumen 117.035

A. Lange & Sohne Platinum Grand Lange 1 Lumen 117.035

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A. Lange & Sohne - A. Lange & Sohne Platinum Grand Lange 1 Watch Ref. 117.025 - The Keystone Watches

A. Lange & Sohne Platinum Grand Lange 1 Watch Ref. 117.025

A. Lange & Sohne Platinum Grand Lange 1 Watch Ref. 117.025

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A. Lange & Sohne - A. Lange & Sohne Platinum Grande Lange 1 Lumen Watch Ref. 117.035 - The Keystone Watches

A. Lange & Sohne Platinum Grande Lange 1 Lumen Watch Ref. 117.035

A. Lange & Sohne Platinum Grande Lange 1 Lumen Watch Ref. 117.035

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Lange One for Sincere Singapore Ref. 112.049 - The Keystone Watches

A. Lange & Sohne Platinum Lange One for Sincere Singapore Ref. 112.049

A. Lange & Sohne Platinum Lange One for Sincere Singapore Ref. 112.049

Sold Out

 
A. Lange & Sohne Platinum Langematic Perpetual Calendar Ref. 310.225 on Wellendorff Bracelet

A. Lange & Sohne Platinum Langematic Perpetual Calendar Ref. 310.225 on Wellendorff Bracelet

A. Lange & Sohne Platinum Langematic Perpetual Calendar Ref. 310.225 on Wellendorff Bracelet

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Langematik Jubilee Anniversary Enamel Watch Ref. 302.025 - The Keystone Watches

A. Lange & Sohne Platinum Langematik Jubilee Anniversary Enamel Watch Ref. 302.025

A. Lange & Sohne Platinum Langematik Jubilee Anniversary Enamel Watch Ref. 302.025

Sold Out

 
A. Lange & Sohne Platinum Langematik Perpetual Calendar Ref. 310.025

A. Lange & Sohne Platinum Langematik Perpetual Calendar Ref. 310.025

A. Lange & Sohne Platinum Langematik Perpetual Calendar Ref. 310.025

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Langematik Perpetual Watch Ref. 310.225 - The Keystone Watches

A. Lange & Sohne Platinum Langematik Perpetual Watch Ref. 310.225

A. Lange & Sohne Platinum Langematik Perpetual Watch Ref. 310.225

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Rattrapante Perpetual Calendar Ref. 421.025 - The Keystone Watches

A. Lange & Sohne Platinum Rattrapante Perpetual Calendar Ref. 421.025

A. Lange & Sohne Platinum Rattrapante Perpetual Calendar Ref. 421.025

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Rose Gold 1815 Flyback Chronograph Watch - The Keystone Watches

A. Lange & Sohne Rose Gold 1815 Flyback Chronograph Watch

A. Lange & Sohne Rose Gold 1815 Flyback Chronograph Watch

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A. Lange & Sohne - A. Lange & Sohne Rose Gold 1815 Tourbillon Watch Ref. 730.032 - The Keystone Watches

A. Lange & Sohne Rose Gold 1815 Tourbillon Watch Ref. 730.032

A. Lange & Sohne Rose Gold 1815 Tourbillon Watch Ref. 730.032

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Rose Gold Datograph Dufour Watch Ref. 403.031 - The Keystone Watches

A. Lange & Sohne Rose Gold Datograph Dufour Watch Ref. 403.031

A. Lange & Sohne Rose Gold Datograph Dufour Watch Ref. 403.031

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A. Lange & Sohne - A. Lange & Sohne Rose Gold Grand Lange 1 Moonphase Watch Ref. 139.032 - The Keystone Watches

A. Lange & Sohne Rose Gold Grand Lange 1 Moonphase Watch Ref. 139.032

A. Lange & Sohne Rose Gold Grand Lange 1 Moonphase Watch Ref. 139.032

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A. Lange & Sohne Rose Gold Lange 1 Ref. 101.032

A. Lange & Sohne Rose Gold Lange 1 Ref. 101.032

A. Lange & Sohne Rose Gold Lange 1 Ref. 101.032

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Rose Gold Lange 1 Ref. 111.031 - The Keystone Watches

A. Lange & Sohne Rose Gold Lange 1 Ref. 111.031

A. Lange & Sohne Rose Gold Lange 1 Ref. 111.031

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Rose Gold Lange 1 Tourbillon Watch - The Keystone Watches

A. Lange & Sohne Rose Gold Lange 1 Tourbillon Watch

A. Lange & Sohne Rose Gold Lange 1 Tourbillon Watch

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A. Lange & Sohne - A. Lange & Sohne Rose Gold Lange 1 Tourbillon Watch Ref. 704.032 - The Keystone Watches

A. Lange & Sohne Rose Gold Lange 1 Tourbillon Watch Ref. 704.032

A. Lange & Sohne Rose Gold Lange 1 Tourbillon Watch Ref. 704.032

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A. Lange & Sohne - A. Lange & Sohne Rose Gold Lange 1 Watch Ref. 101.031 - The Keystone Watches

A. Lange & Sohne Rose Gold Lange 1 Watch Ref. 101.031

A. Lange & Sohne Rose Gold Lange 1 Watch Ref. 101.031

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Rose Gold Lange 1 Watch Ref. 101.033 - The Keystone Watches

A. Lange & Sohne Rose Gold Lange 1 Watch Ref. 101.033

A. Lange & Sohne Rose Gold Lange 1 Watch Ref. 101.033

Sold Out

 
A. Lange & Sohne Rose Gold Richard Lange Ref. 232.032

A. Lange & Sohne Rose Gold Richard Lange Ref. 232.032

A. Lange & Sohne Rose Gold Richard Lange Ref. 232.032

$19,500 USD
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New Arrivals Preview
 
Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307 (New Arrival)

Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307 (New Arrival)

Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307 (New Arrival)

$1,950,000 USD
 
Rolex Cosmograph Daytona Big Red Ref. 6265 Box and Papers (New Arrival)

Rolex Cosmograph Daytona Big Red Ref. 6265 Box and Papers (New Arrival)

Rolex Cosmograph Daytona Big Red Ref. 6265 Box and Papers (New Arrival)

$97,500 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
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.

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