Housed in a 40 mm white gold case measuring 10.53 mm in height, the 5178G-012 is a testament to Patek Philippe's Grand Complications heritage. The case features interchangeable solid and sapphire crystal case backs and is humidity- and dust-protected. Powering the watch is the self-winding mechanical Caliber R 27 PS, which drives a minute repeater with chime on two cathedral gongs alongside a small seconds display.
The dial is a work of decorative craft in its own right: an 18K gold dial plate serves as the foundation for a hand-guilloché swirling pattern, finished beneath Grand Feu blue transparent enamel in the flinqué technique. Gold applied Breguet numerals complete the composition, lending the piece a classical legibility that complements its ornate surface.
The watch is presented on a hand-stitched shiny peacock blue alligator leather strap with square scales and a fold-over clasp, with an additional hand-stitched shiny orange alligator leather strap with square scales included. Both straps are originally fitted options for the reference.
