Just 6.3mm high, with the movement thickness 2.89mm, the Audemars Piguet Replica Watches Royal Oak RD#2 is the slimmest perpetual calendar on the market by quite some margin.Most slim perpetual calendar watches hover around the 8mm mark, case and all. The Vacheron Overseas Ultra-Thin Perpetual Calendar is 8.1mm, while the Patek Philippe ref. 5940 is 8.48mm. The […]