Vintage Audemars Piguet Cobra 5403 watch, 18k gold, diamond dial, Jumbo case, automatic movement, on wrist on black background
Vintage Audemars Piguet Cobra 5403 watch, 18k gold, diamond dial, Jumbo case, on wrist on blurred background
Close-up of Vintage Audemars Piguet Cobra 5403 watch, 18k gold, diamond dial, Jumbo case, automatic movement, held by hands
Vintage Audemars Piguet Cobra 5403 watch, 18k gold, diamond dial, Jumbo case, automatic movement, held by hands

Audemars Piguet Cobra 5403 Jumbo 1970s

Regular price €34.900
Taxes included. Shipping calculated at checkout.
Only 1 available

Free insured express delivery worldwide

Trusted by 2,000+ collectors worldwide

GOLDAMMER authenticity guarantee

1-year mechanical warranty

14-day free & easy returns

Audemars Piguet Cobra 5403 — Jumbo 18k Yellow Gold with Diamond Dial (1970s)

A striking icon of 1970s Audemars Piguet design — bold, sculptural, and unmistakably luxurious.

This rare AP Ref. 5403, nicknamed “Cobra”, gets its name from the woven, scale-like pattern of its heavy 18k yellow gold bracelet, which integrates seamlessly into the case for a fluid, serpentine aesthetic. The oversized 35 mm case (large for its era) delivers strong wrist presence while remaining ultra-slim and refined.

Its vertically brushed gold dial features 12 factory-set diamonds, perfectly complementing the warm tones of the gold case and bracelet. The hands and crown are original, completing the watch’s beautifully preserved authenticity.

Inside beats the legendary Audemars Piguet Caliber 2121, one of the finest ultra-thin automatic movements ever made — derived from the same architecture used in the early Royal Oak.

A rare opportunity to acquire a statement piece of AP’s design heritage — both powerful and elegant in equal measure.

- wrist size in our picture is 18 cm circumference -

DIAL:

  • original never touched golden vertically brushed dial in flawless condition
  • 12 factory Diamonds on the dial
  • original hands & crown

BRACELET & CLASP:

  • 18k yellow gold AP bracelet is fitting up to a 18 cm and is slightly adjustable at the clasp (around 0.5 cm) / 2 mm thick
  • major adjustments have to be made by a goldsmith
  • 18k yellow gold AP clasp 

CASE:

  • excellent overall condition, showing minor traces of use
  • 3- body 18k yellow gold case with screw-down case back from casemaker C.R. Spillmann & Co. SA
  • 35 mm (without crown) / 42 mm (lug-to-lug) / 22 mm (between lugs) / 6.8 mm thick
  • year: 1970s
  • reference: 5403
  • total weight: 143 g

MOVEMENT:

  • Audemars Piguet Cal. 2121 - automatic
  • 36 jewels, 19800 A/h, 40 hours power reserve
  • professionally serviced 03/2025
  • +5 sec/d / 250°

BOX & PAPERS:

  • GOLDAMMER certificate of authenticity & service documentation card
  • GOLDAMMER box

GOLDAMMER REFERENCE: #1001

Audemars Piguet

In the Vallée de Joux — cradle of Swiss high horology — two young watchmakers joined forces in 1875. Their names were Jules-Louis Audemars and Edward-Auguste Piguet. From that moment on, Audemars Piguet has remained fiercely independent, family-owned, and uncompromising in its vision of what fine watchmaking should be.

Among the elite houses of horology, AP is the rebel artist. Innovative, daring, and forever rewriting the rules of design and engineering. In the 20th century, they were the first to create minute repeaters in wristwatch form. But it was in 1972 that Audemars Piguet changed watchmaking forever — with the birth of the Royal Oak.

A steel sports watch. With visible screws. An octagonal bezel. And a level of finishing usually reserved for gold. It was radical. Audacious. And in time, it became iconic.

Today, vintage watch collectors consider early Royal Oak references among the most desirable timepieces in the world. But the brand’s legacy runs deeper than one model. AP has always walked the fine line between artistry and technical prowess — whether through skeletonized perpetual calendars, ultra-thin tourbillons, or experimental case materials that push what a vintage watch can be.

To wear an Audemars Piguet is to wear confidence. It is for the collector who appreciates the avant-garde but demands heritage. Someone who seeks boldness, but never at the cost of substance. Someone who chooses a vintage watch not because it follows the rules — but because it rewrites them.

Audemars Piguet doesn’t just make watches. It creates icons that break molds — and then hand-finishes them to perfection.

Because tradition isn’t meant to be preserved under glass. It’s meant to evolve — beautifully, fearlessly, and with purpose.

The buying process for deliveries to outside the European Union - insofar as your destination is relevant for import tax - is handled as followed:

1. You order the watch through our shop or by direct wire transfer

2. We claim the export documents at the German customs (takes 1 working day)

3. We are shipping the watch insured via DHL Express or Fedex (takes 2-3 days to reach your country)

4. You will receive an E-Mail with the requested import taxes from Fedex/DHL Express which you can pay online

5. The watch will be delivered usually within 5 working days (sometimes longer, depending on customs)

For more information, please visit our frequently asked questions page.

Inquiries & Bank Wire

Do you have any questions or want to pay by bank transfer? Email us. Our Head of Sales [email protected] is here to assist you.


Trusted by over 2,000 collectors in 40+ countries


Certified Vintage Watches

Vintage Omega watch held by a gloved hand over a certificate of authenticity.

Authenticity Guarantee

Every watch is expertly authenticated by our specialists — certificate included.

Close-up of a Vintage Watch Movement of a Patek Philippe Watch.

Comprehensive Warranty

Our watches are covered by a 1-year mechanical warranty.

Gold vintage Audemars Piguet watch held gently with both hands.

Professionally serviced

Each watch is professionally serviced by our team of watchmakers for flawless function from day one.


Do you require further assistance?

Explore our FAQ page for thoughtfully curated answers to guide your experience.


Classic vintage watch worn on a wrist above vintage watches and luxury watches on a desk.

Be the first to access our weekly releases

When you sign up, you'll get:

Early access to new watches
Vintage-Watch-Buying Guide
Look behind the scenes