Campanola Golden CTU57-0683 Perpetual CalendarModel: Campanola Golden CTU57 0683 Perpetual Calendar Year: 2001 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, sunburst,