Audemars Piguet Royal Oak Ref. 4100BA – 1980

The Classic Royal Oak Refined in 18k Yellow Gold

When the Ref. 4100 debuted in 1977, it marked a pivotal evolution in the Royal Oak lineage — the first to feature a central seconds hand and a more wearable 35 mm case, designed for those who found the Jumbo models too large.

Our 1980 example, the 4100BA, is the full 18k yellow gold version and comes in absolutely stunning condition. The grey petit-tapisserie dial, produced by Stern Frères, is a work of art — bearing all the rich texture and timeless charm that defines early Royal Oaks.

Powered by the automatic Caliber 2123, based on Jaeger-LeCoultre’s ultra-thin movement and custom-finished by AP, it offers performance and prestige in equal measure.

Paired with its original Royal Oak 18k gold bracelet and a signed AP clasp, this reference is a quintessential blend of sport and elegance — a golden icon for serious collectors, especially with the original Extract from Archives from Audemars Piguet.

- wrist size in our picture is 18cm circumference -

DIAL:

original grey colored petit-tapisserie dial in flawless condition
original hands & crown
evenly aged lume on hands and dial
dial most likely was replaced with a original AP service dial in the past

BRACELET & CLASP:

the 18k yellow gold "Royal Oak" bracelet can be worn up to a 18 cm wrist / 2.2 mm thick
original Audemars Piguet clasp

CASE:

excellent overall condition, showing minor traces of use
3- body 18k yellow gold case with screw down case back
35 mm (without crown) / 44 mm (lug-to-lug) / 23 mm (bracelet) / 8 mm thick
Year: 1980
Ref.: 4100BA
total weight: 162 g

MOVEMENT:

Audemars Piguet Cal. 2123 - automatic
33 jewels, 28800 A/h, 40 hours power reserve
professionally serviced 09/2025
-2 sec/d / 300°

BOX & PAPERS:

comes with an Extract from the archives of Audemars Piguet from July 2023
GOLDAMMER certificate of authenticity & service documentation card
GOLDAMMER box

GOLDAMMER REFERENCE: #1202

Audemars Piguet Vintage Watches

Audemars Piguet 4100BA Royal Oak 1980

Audemars Piguet Royal Oak 14486SA Automatic 1980s

Audemars Piguet 56175TR Royal Oak Tantalum 1980s

Audemars Piguet 6005SA Royal Oak 1980s

Audemars Piguet Calatrava Automatic 1970s