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A. Lange & Sohne - A. Lange & Sohne Lange 1 Yellow Gold Watch Ref. 115.021 - The Keystone Watches

A. Lange & Sohne Lange 1 Yellow Gold Watch Ref. 115.021

A. Lange & Sohne Lange 1 Yellow Gold Watch Ref. 115.021

Sold Out

 
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

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne White Gold Perpetual Calendar Watch Ref. 310.026 - The Keystone Watches

A. Lange & Sohne White Gold Perpetual Calendar Watch Ref. 310.026

A. Lange & Sohne White Gold Perpetual Calendar Watch Ref. 310.026

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Yellow Gold Lange 1 Ref. 101.021 - The Keystone Watches

A. Lange & Sohne Yellow Gold Lange 1 Ref. 101.021

A. Lange & Sohne Yellow Gold Lange 1 Ref. 101.021

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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

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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 White Gold Flyback Chronograph Ref. 401.026 - The Keystone Watches

A. Lange Sohne White Gold Flyback Chronograph Ref. 401.026

A. Lange Sohne White Gold Flyback Chronograph Ref. 401.026

Sold Out

 
A. Lange & Sohne - A. Lange & Sohne Platinum Darth Lange 1 Ref. 101.035 - The Keystone Watches

A. Lange & Sohne Platinum Darth Lange 1 Ref. 101.035

A. Lange & Sohne Platinum Darth Lange 1 Ref. 101.035

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

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A. Lange & Sohne - A. Lange & Sohne White Gold Saxonia Annual Calendar Ref. 330.026 - The Keystone Watches

A. Lange & Sohne White Gold Saxonia Annual Calendar Ref. 330.026

A. Lange & Sohne White Gold Saxonia Annual Calendar Ref. 330.026

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A. Lange & Sohne - A. Lange & Sohne White Gold Sax-O-Mat Automatic Ref. 351.027 - The Keystone Watches

A. Lange & Sohne White Gold Sax-O-Mat Automatic Ref. 351.027

A. Lange & Sohne White Gold Sax-O-Mat Automatic Ref. 351.027

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A. Lange & Sohne - A Lange & Sohne Rose Gold Richard Lange Referenzuhr Ref. 250.032 - The Keystone Watches

A Lange & Sohne Rose Gold Richard Lange Referenzuhr Ref. 250.032

A Lange & Sohne Rose Gold Richard Lange Referenzuhr Ref. 250.032

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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 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

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A. Lange & Sohne - A. Lange & Sohne Platinum Datograph Baguette Diamond Up Down Watch Ref. 405.835 - The Keystone Watches

A. Lange & Sohne Platinum Datograph Baguette Diamond Up Down Watch Ref. 405.835

A. Lange & Sohne Platinum Datograph Baguette Diamond Up Down Watch Ref. 405.835

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A. Lange & Sohne - A. Lange & Sohne White Gold Pour Le Merite Watch Ref. 260.028 - The Keystone Watches

A. Lange & Sohne White Gold Pour Le Merite Watch Ref. 260.028

A. Lange & Sohne White Gold Pour Le Merite Watch Ref. 260.028

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A. Lange & Sohne - A. Lange & Sohne Yellow Gold Saxonia Bracelet Watch - The Keystone Watches

A. Lange & Sohne Yellow Gold Saxonia Bracelet Watch

A. Lange & Sohne Yellow Gold Saxonia Bracelet Watch

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A. Lange & Sohne - A. Lange & Sohne White Gold Dual TIme Watch, Ref. 386.026 - The Keystone Watches

A. Lange & Sohne White Gold Dual TIme Watch, Ref. 386.026

A. Lange & Sohne White Gold Dual TIme Watch, Ref. 386.026

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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

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A. Lange & Sohne - A Lange & Sohne Rose Gold Saxonia Dual Time Watch Ref. 385.032 - The Keystone Watches

A Lange & Sohne Rose Gold Saxonia Dual Time Watch Ref. 385.032

A Lange & Sohne Rose Gold Saxonia Dual Time Watch Ref. 385.032

Sold Out

 
A. Lange & Sohne - A Lange & Sohne White Gold Saxonia Annual Calendar Watch, Ref. 330.026 - The Keystone Watches

A Lange & Sohne White Gold Saxonia Annual Calendar Watch, Ref. 330.026

A Lange & Sohne White Gold Saxonia Annual Calendar Watch, Ref. 330.026

Sold Out

 
A. Lange & Sohne - A Lange & Sohne Lange 1 Yellow Gold - The Keystone Watches

A Lange & Sohne Lange 1 Yellow Gold

A Lange & Sohne Lange 1 Yellow Gold

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New Arrivals Preview
 
Cartier Yellow Gold Bracelet Watch (New Arrival)

Cartier Yellow Gold Bracelet Watch (New Arrival)

Cartier Yellow Gold Bracelet Watch (New Arrival)

$30,000 USD
 
Patek Philippe Yellow Gold Calatrava Breguet Numerals Ref. 2533 (New Arrival)

Patek Philippe Yellow Gold Calatrava Breguet Numerals Ref. 2533 (New Arrival)

Patek Philippe Yellow Gold Calatrava Breguet Numerals Ref. 2533 (New Arrival)

$105,000 USD
 
Vacheron Constantin - Vacheron Constantin Yellow Gold Chronograph Watch Ref. 4178 with Important Provenance (New Arrival) - The Keystone Watches

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
 
Audemars Piguet - Audemars Piguet White Gold Rectangular Watch with Lapis Watch (New Arrival) - The Keystone Watches

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
 
Audemars Piguet White Gold Cobra-style Bracelet Watch (New Arrival)

Audemars Piguet White Gold Cobra-style Bracelet Watch (New Arrival)

Audemars Piguet White Gold Cobra-style Bracelet Watch (New Arrival)

$17,000 USD
 
Patek Philipp Steel Jumbo UFO Ref. 3580 (New Arrival)

Patek Philipp Steel Jumbo UFO Ref. 3580 (New Arrival)

Patek Philipp Steel Jumbo UFO Ref. 3580 (New Arrival)

$16,000 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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