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Audemars Piguet Yellow Gold Perpetual Automatic Watch Ref. 5549

Audemars Piguet Yellow Gold Perpetual Automatic Watch Ref. 5549

Audemars Piguet Yellow Gold Perpetual Automatic Watch Ref. 5549

$45,000 USD
 
Audemars Piguet Yellow Gold John Shaeffer Perpetual Calendar Minute Repeater Watch Ref. 25835

Audemars Piguet Yellow Gold John Shaeffer Perpetual Calendar Minute Repeater Watch Ref. 25835

Audemars Piguet Yellow Gold John Shaeffer Perpetual Calendar Minute Repeater Watch Ref. 25835

$345,000 USD
 
Audemars Piguet Perpetual Calendar Minute Repeater Murat Pocket Watch

Audemars Piguet Perpetual Calendar Minute Repeater Murat Pocket Watch

Audemars Piguet Perpetual Calendar Minute Repeater Murat Pocket Watch

$275,000 USD
 
Audemars Piguet Platinum Quantieme Perpetual Calendar Watch Ref. 25850

Audemars Piguet Platinum Quantieme Perpetual Calendar Watch Ref. 25850

Audemars Piguet Platinum Quantieme Perpetual Calendar Watch Ref. 25850

$115,000 USD
 
Audemars Piguet Yellow Gold Royal Oak Perpetual Watch Ref. 25554

Audemars Piguet Yellow Gold Royal Oak Perpetual Watch Ref. 25554

Audemars Piguet Yellow Gold Royal Oak Perpetual Watch Ref. 25554

$110,000 USD
 
Patek Philippe White Gold Perpetual Calendar Ref. 5139 (New Arrival)

Patek Philippe White Gold Perpetual Calendar Ref. 5139 (New Arrival)

Patek Philippe White Gold Perpetual Calendar Ref. 5139 (New Arrival)

$42,000 USD
 
Patek Philippe Platinum Perpetual Calendar Minute Repeater Watch Ref. 5374

Patek Philippe Platinum Perpetual Calendar Minute Repeater Watch Ref. 5374

Patek Philippe Platinum Perpetual Calendar Minute Repeater Watch Ref. 5374

$875,000 USD
 
Audemars Piguet Yellow Gold Perpetual Calendar Minute Repeater Pocket Watch, Retailed by Asprey

Audemars Piguet Yellow Gold Perpetual Calendar Minute Repeater Pocket Watch, Retailed by Asprey

Audemars Piguet Yellow Gold Perpetual Calendar Minute Repeater Pocket Watch, Retailed by Asprey

$155,000 USD
 
A. Lange & Sohne White Gold Perpetual Calendar Watch Ref. 310.026

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

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

$64,000 USD
 
Patek Philippe Yellow Gold Perpetual Calendar Watch Ref. 3448, Circa 1977

Patek Philippe Yellow Gold Perpetual Calendar Watch Ref. 3448, Circa 1977

Patek Philippe Yellow Gold Perpetual Calendar Watch Ref. 3448, Circa 1977

$225,000 USD
 
Patek Philippe White Gold Perpetual Calendar Watch Ref. 3448

Patek Philippe White Gold Perpetual Calendar Watch Ref. 3448

Patek Philippe White Gold Perpetual Calendar Watch Ref. 3448

$975,000 USD
 
Rolex - Rolex Oyster Perpetual Honeycomb Ovetone Watch Ref. 6098 - The Keystone Watches

Rolex Oyster Perpetual Honeycomb Ovetone Watch Ref. 6098

Rolex Oyster Perpetual Honeycomb Ovetone Watch Ref. 6098

$55,000 USD
 
Rolex Rose Gold Turnograph Oyster Perpetual Ref. 6309

Rolex Rose Gold Turnograph Oyster Perpetual Ref. 6309

Rolex Rose Gold Turnograph Oyster Perpetual Ref. 6309

$35,000 USD
 
Vacheron Constantin Platinum Perpetual Calendar Diamond & Sapphire Watch Ref. 43031

Vacheron Constantin Platinum Perpetual Calendar Diamond & Sapphire Watch Ref. 43031

Vacheron Constantin Platinum Perpetual Calendar Diamond & Sapphire Watch Ref. 43031

$85,000 USD
 
Patek Philippe Perpetual Calendar Watch Ref. 3448, Late Series with Sapphire Crystal

Patek Philippe Perpetual Calendar Watch Ref. 3448, Late Series with Sapphire Crystal

Patek Philippe Perpetual Calendar Watch Ref. 3448, Late Series with Sapphire Crystal

$275,000 USD
 
Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307

Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307

Patek Philippe Platinum Perpetual Calendar Minute Repeater Ref. 5307

$1,850,000 USD
 
Patek Philippe White Gold Perpetual Calendar Chronograph Diamond Watch Ref. 5021, Likely Unique

Patek Philippe White Gold Perpetual Calendar Chronograph Diamond Watch Ref. 5021, Likely Unique

Patek Philippe White Gold Perpetual Calendar Chronograph Diamond Watch Ref. 5021, Likely Unique

$600,000 USD
 
Patek Philippe Yellow Gold Perpetual Calendar Watch Ref. 3450 with Clear Exhibition Back

Patek Philippe Yellow Gold Perpetual Calendar Watch Ref. 3450 with Clear Exhibition Back

Patek Philippe Yellow Gold Perpetual Calendar Watch Ref. 3450 with Clear Exhibition Back

$350,000 USD
 
Audemars Piguet Steel & Platinum Royal Oak Perpetual Calendar Watch Ref. 25820SP

Audemars Piguet Steel & Platinum Royal Oak Perpetual Calendar Watch Ref. 25820SP

Audemars Piguet Steel & Platinum Royal Oak Perpetual Calendar Watch Ref. 25820SP

$140,000 USD
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
 
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
 
Cartier - Cartier Yellow Gold Tank Reverso (New Arrival) - The Keystone Watches

Cartier Yellow Gold Tank Reverso (New Arrival)

Cartier Yellow Gold Tank Reverso (New Arrival)

$34,500 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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