# Audemars Piguet Perpertual 5548BA Quantieme Perpetual Stainless Steel

- Link: https://palazzowatches.com/product/audemars-piguet-quantieme-perpertual-5548ba/
- Published: 2025-10-16T16:37:52-04:00
- Author: Michael Martucci

## Details

- Stock number: 5548BA
- Availability: Out of stock
- Case Material: Yellow Gold
- Brand: Audemars Piguet
- Reference: 5548BA
- Dial Color: Silver
- Condition: Pre-owned
- Movement: Automatic
- Case Size: 41mm
- Offered by: Palazzo Watches & Gems, Jersey City, NJ

The Audemars Piguet Quantieme Perpetuel 5548BA is one of the most historically important
automatic perpetual calendars Audemars Piguet has ever produced. When the 5548 debuted
in 1978, it was the world’s thinnest automatic perpetual calendar wristwatch, an
achievement made possible by the Caliber 2120/2 ultra-thin self-winding movement
developed in collaboration between Jaeger-LeCoultre, Audemars Piguet, Patek Philippe,
and Vacheron Constantin in the late 1960s. The 5548BA carries that movement in an
18k yellow gold dress case under 8mm thick, with the slim bezel and refined dauphine
hands that defined late-1970s and early-1980s Genevan dress watchmaking. The silvered
dial carries the full perpetual calendar program in four sub-dials, displaying day
of the week, date, month with leap-year indicator, and moon phase, with the calendar
correctly tracking through century-end exceptions until 2100 without manual adjustment.
The Caliber 2120/2 beats through 38 jewels with the patented beryllium-rail full-
rotor system that remains, decades later, one of the thinnest full-rotor automatic
architectures ever produced in serial wristwatch production. Pre-owned.