The 5020P-016 departs from traditional case design through its tonneau shaped platinum construction, measuring approximately 37 by 45 mm. This geometry introduces curvature that enhances wrist presence while accommodating the CH 27 70 Q movement. The watch combines perpetual calendar and chronograph functions within a non circular layout, requiring careful spatial arrangement of subdials and calendar displays. Its production volume was significantly lower than comparable round references, contributing to its relative scarcity in the secondary market.