Introducing – The Roger Dubuis Excalibur Biretrograde Calendar in Steel

Last year, Roger Dubuis unveiled the Excalibur Biretrograde Calendar, a revival of a signature biretrograde complication co-patented by founder Roger Dubuis and Jean-Marc Wiederrecht (Agenhor) in 1989. Although this calendar version is simpler than the double retrograde QP the two men developed, it features the signature retrograde aesthetic intimately associated with Roger Dubuis. Following the […]