Audemars Piguet Royal Oak Rectangular Ref. 6005ST 1970s

$35,000.00 NZD

A fascinating relic of the experimental Quartz era, the Audemars Piguet Ref. 6005ST is a bold and elegant fusion of brutalist case design, high-end finishing, and technical ingenuity. Often mistaken for a Royal Oak due to its integrated bracelet and angular lines, this model was part of AP’s “Quartz Line”, introduced in the late 1970s but never officially branded as a Royal Oak. Instead, it embodies a daring period of design experimentation — one where form, materiality, and cutting-edge quartz calibres were explored with true watchmaking intent. With its black tapisserie dial, Calibre 2511 movement, and striking steel case, the 6005ST is a sleeper gem for collectors seeking the rare and unusual.

Audemars Piguet Royal Oak Rectangular Ref. 6005ST 1970s

A fascinating relic of the experimental Quartz era, the Audemars Piguet Ref. 6005ST is a bold and elegant fusion of brutalist case design, high-end finishing, and technical ingenuity. Often mistaken for a Royal Oak due to its integrated bracelet and angular lines, this model was part of AP’s “Quartz Line”, introduced in the late 1970s but never officially branded as a Royal Oak. Instead, it embodies a daring period of design experimentation — one where form, materiality, and cutting-edge quartz calibres were explored with true watchmaking intent. With its black tapisserie dial, Calibre 2511 movement, and striking steel case, the 6005ST is a sleeper gem for collectors seeking the rare and unusual.

Details
- Maker
  
  Audemars Piguet
- Model
  
  Royal Oak Rectangular
- Reference
  
  6005ST
- Year
  
  1970s (approx.)
- Serial
  
  BXXXXX
- Box & Papers
  
  No
- Movement
  
  Caliber. 2511, quartz w/ sweeping minutes function
- Dial & Hands
  
  Black tapisserie dial and stainless steel hands
- Bezel
  
  Fixed, stainless steel
- Crystal
  
  Sapphire
- Bracelet/Strap
  
  Integrated Royal Oak bracelet, stainless steel
- Performance
  
  Watch is fully functioning and running
Dimensions
- Width: 32mm
- Length: 41mm
- Thickness: 7mm
Materials

Stainless steel

Features AP’s Caliber 2511, which allows quick-set hour adjustment via the crown and minute adjustment through an inset pusher — an innovative configuration designed for travellers and unique to the Quartz experimentation era
Although not officially branded as a Royal Oak, the brutalist steel case and integrated bracelet unmistakably echo the language of Genta’s iconic design — making it a “hidden sibling” in AP’s 1970s lineup
Produced in limited numbers during a short period, the Ref. 6005ST is part of Audemars Piguet’s lesser-known Quartz Line, offering a rare collecting opportunity for those seeking unconventional, under-the-radar pieces from major maisons

Very minor scratches on the case

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