At Collectability, we take great pride in our scholarship of all things Patek Philippe and nothing gives us more pleasure than to learn the views and insights from others in the watch community. In this in-depth study of the iconic ref. 3940, our Italian friend Federico Muggia, @fedoclock, dives deep into the world of the reference … Continue reading A COLLECTOR’S OPINION: PATEK PHILIPPE PERPETUAL CALENDAR REF. 3940