Roger Dubuis has redesigned their popular Excalibur Chronograph watch, and while the changes are subtle the brands attempt to modernized the design seems to have been successful. The new model EX45-78-90-00/09R01/B has a round 45 milimeter stainless steel case with a now more deeply fluted bezel. The dial has a black background with white transferred Roman numerals. The black sub-dials are located at 3 and 9 o'clock and have white transferred Arabic numerals. The black bottom flange has yellow Arabic numerals while the black top flange has white minute-track transfers and white gold appliques. The watch is completed by a fully adjustable black hand-stitched genuine alligator strap with a steel adjustable folding buckle. This model will be limited to 280 production pieces.

The Excalibur Chronograph is powered by the RD78 automatic chronograph movement with micro-rotor in tungsten alloy. The movement is finely adjusted to five positions and features a double-pusher. The movement provides functions for hours and minutes located at the centre, chronograph hand located at the centre, semi-instantaneous 45-minute counter at 3 o'clock, and small seconds at 9 o'clock. The movement is comprised of 303 individual parts which includes 36 jewels and measures 13"'3/4 in diameter by 5.80 millimeters. The movement is adored with rhodium-plated decoration and allows for a 42 hours power reserve.