Measuring 44.6 mm x 37.0 mm, the cushion-shaped stainless steel case of reference 5950A-001 draws a clear line back to Patek Philippe's heritage designs of the 1920s. A fluted stainless steel monopusher crown handles winding and setting, while a dedicated split-seconds pusher positioned at 2 o'clock keeps the case profile elegantly resolved. Water resistance extends to 30 meters, and a scratch-resistant sapphire crystal protects the dial below.
That dial — silver opaline in tone — is defined by its black-lacquered engraved scroll corners and blackened 18k white gold applied Breguet numerals. A small seconds subdial sits at 9 o'clock, a 60-minute counter at 3 o'clock, and the whole composition rests above a brown hand-stitched alligator leather strap fastened by a stainless steel folding clasp. Two interchangeable case backs — one transparent sapphire, one solid stainless steel — allow the wearer to choose between showcasing the movement or maintaining a cleaner profile.
Driving the watch is the manual-winding Patek Philippe Caliber CHR 27-525 PS, a movement recognized as one of the thinnest column-wheel split-seconds chronograph calibers ever produced, offering a power reserve of approximately 48 hours. This pre-owned example is presented in excellent condition and is accompanied by its original box and papers.
