ZF Factory Edition — Integrated Stainless Steel Bracelet
The 34mm Royal Oak reference 77350ST represents a critical sizing bracket for collectors seeking classic proportions without the bulk of the 15500. This ZF iteration is notable for integrating a bespoke movement architecture rather than relying on standard off-the-shelf calibers with decorative plates, allowing for proper date wheel positioning.
Powering this reference is the custom Calibre 5800 clone, operating at a steady 28,800 bph. The movement architecture mirrors the original layout, featuring 186 finished parts and a custom-decorated rotor. Power reserve is strictly regulated to approximately 36 hours, ensuring consistent amplitude across its winding cycle.
The 316L stainless steel case measures precisely 34mm in diameter with a verified thickness of 9.6mm, weighing in at 115.4g. The dial features the signature Grande Tapisserie pattern in a deep blue (#003A70) tone, complemented by alternating brushed and polished finishing on the integrated bracelet links.
- Movement: Custom Calibre 5800 Clone (28,800 bph) — Approximately 36 hours
- Case Material: 316L Stainless Steel, 34mm diameter, 115.4g
- Bezel: 316L Stainless Steel with directional brushing and polished chamfers
- Crystal: Scratch-resistant Sapphire with Colorless AR Coating
- Bracelet: Integrated 316L Stainless Steel, AP folding clasp
- Water Resistance: Stated 50m — professional pressure test recommended before swimming
This specific reference serves collectors who require a more restrained footprint than the standard 41mm or 37mm Royal Oak variants. It balances mechanical integrity with a highly wearable profile for smaller wrists.

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