A truly cool limited series of 300 pieces. The case is of titanium, and yes, that is a "bullhead" orientation for the crown and pushers!
Here are the pertinents, straight from the source -
A historical model returns: with the Model R500 limited to 300 pieces, we’re presenting a racing stopwatch with this extraordinary design in our range for the first time in many years. What sets this watch apart visually is the position of the crown at 12 o’clock and the push-pieces at 11 and 1 o’clock. Thanks to this arrangement, the Model R500 represents an analogy to the traditional stopwatch and motorsport. The tachymeter scale on the interior bezel is used to measure speeds. With the power reserve indicator at 12 o’clock, you can always see whether the timepiece is ready to go. The displays for hour, minute and subsidiary second and the stop functions for 12 hours, 30 minutes and 60 seconds are mounted in the centre for high-precision time measurement.
The unusual positions of the crown and push-pieces - also known as the “bullhead chronograph” due to the appearance of a bull’s head - requires an extremely demanding case construction. The dial slopes downwards from top to bottom and is thus angled towards the wearer, who can conveniently adjust the crown and push-pieces at the wrist.
The satinised case itself is made of high-strength titanium (Grade 5), which underlines the technical and contemporary interpretation of the watch and ensures a comfortable fit.
The R500 is equipped with a black cowhide strap with red seam integrated into the case. The recessed strap embossing pays homage to the hole pattern design so common in motorsport.
25 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Anti-magnetic as per DIN 8309
Case made of high-strength titanium, satinised
Sapphire crystal glass in front, anti-reflective on both sides
Case back screw-fastened
Meets the technical requirements for waterproofness, as set out in standard DIN 8310
Waterproof and pressure-resistant up to 20 bar
Low pressure resistant
Hours, minutes, subsidiary seconds
Interior tachymeter scale up to 500 km/h
Power reserve indicator
Dimensions and Weight
Case diameter: 42 mm
Band lug width: 24 mm
Case thickness: 16 mm at 12 o'clock and 13 mm at 6 o'clock
Dial and Hands
Matte black dial
Indices coated with luminescent colour
Hour and minute hand coated with luminescent colour