Audemars Piguet 2120/2802

The 2120/2802 is an automatic perpetual calendar movement from Audemars Piguet, featuring an ultra-thin module mounted on the 2120 base caliber. Part of the 21xx caliber family, it displays day, date, month, and leap year indications through a concise dial layout. While the base movement was developed by Jaeger-LeCoultre rather than manufactured in-house, the perpetual calendar module showcases AP's finishing and adjustment expertise. The caliber was discontinued but remains well-regarded among collectors for its thin profile and classical perpetual calendar execution.