Around for a quarter-century, the Opus architecture has been thoroughly updated. Its new geometry combines a 41-millimetre diameter with shorter lugs hugging the wrist more comfortably.
The mechanical clarity of the Opus Chronograph is achieved by carefully paring away all superfluous material, leaving nothing but a filigreed skeleton. The dial may be scarcely there after the careful and ingenious skeletonising process – but nevertheless the blue and silver subdial perimeters make a great impression.
Case
Reference
CH-7543.1S-BLSI
Case material
Stainless steel
Case back
Screw-down case back with satin finish and flat sapphire crystal
Diameter in mm
41mm
Height in mm
12.7
Finish
Partly polished, partly with vertical satin finish
Bezel
Polished screw-down bezel with side knurling and full thread. Curved, non-reflecting sapphire crystal.
Caliber/Movement
Caliber
Caliber C. 741 S, automatic, skeletonized
Frequency
4 Hz 28,800 A/H
Power reserve in hours
Approx. 46h
Number of jewels
25
Dial
Dial material
Skeletonized, galvanic blue and silver
Display/s
Central hours and minutes, small seconds, central chronograph seconds, 30-minute counter, 12-hour counter, analog date
