Campanola AG6250-09E Triple Perpetual CalendarModel: Campanola AG6250 09E Triple Perpetual Calendar Year: May 2019 Features: The Collection. Campanolas are renowned for their use of layering, often opting for a distinctly three dimensional look, as demonstrated above. Taking a typically chaotic complication, like a Triple Date Perpetual Calendar, and leaning into that chaos is the Campanolas signature move. There are at least six different metal finishing techniques on display: brushing,