[The Ultimate Piece] Bulgari 103185 Octo Roma Grande Sonnerie Diamond 18K White Gold | MORI

The Octo Roma Grande Sonnerie (Ref. 103185) is the ultimate ultra-complicated watch, pushing the boundaries of Bulgari's watchmaking and embodying the "aesthetics of mechanism" in contemporary haute horlogerie to the extreme.

This timepiece, released to commemorate the 25th anniversary of the original Grande Sonnerie created by Gérald Genta in 1994, is a highly complicated watch boasting astronomical complexity, integrating the three most complex mechanisms in watchmaking—the Grande & Petite Sonnerie (Westminster Chime), Perpetual Calendar, and Tourbillon—into a single movement.

Through the transparent skeleton dial, you can visually enjoy the precise operation of the meticulously finished in-house caliber "BVL 980" and the dynamic sight of four hammers chiming the hours. The dial perfectly harmonizes various perpetual calendar indicators (month, day, day of the week), a high-precision moon phase, and two power reserve displays—one for the movement and one for the chime.

The 44mm Octo case, crafted from 18K white gold, is meticulously set with lavish baguette-cut diamonds from the bezel to the distinctive lugs. The mid-case utilizes lightweight yet robust titanium to maximize acoustic performance.

This is truly a museum-class collector's piece, a miraculous fusion of Rome's high jeweler's overwhelming aesthetic sense and Switzerland's finest ultra-complicated watchmaking technology.