Platinum Watch no. 20523

Case: Platinum, signed Platine, 20523 Dial: Silvered, apertures for day, date, month, moon phase, subsidiary seconds dial, signed "S Bulgari, Rome" Movement: Nickel, bi-metallic balance with flat blued steel balance spring with polished steel kidney piece, signed 20523. Provenance: 19?? - Haas Neveux, Geneve 2025 - Instagram, 5 Apr 2025, "Slim annual calendar 'avec apertures' pw; mvt made by Les fils de Victorin Piguet ~1928-1929 for Haas Neveux&cie; retailed by Bulgari's Rome 'Old Curiosity shop' sometime before 1934. Case [by Eggly&cie ('poinçon de maître '154' & marteau sans manche' used by them in ~1925-1932. After Swiss hallmarks reform, their mastermark became '23' inside Geneva key)] bares whole kit of French hallmarks. Wonder why the 'O' stamp (a regular French customs duty hallmark for movements in gold&platinum cases imported from abroad) looks modified with I-stick. Saw hundreds of such Os on the movements but never in this version."