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The Omega 8500 Movement Screw For Wheel Train Bridge (7228500A3535) is a genuine Swiss-made component for the Omega Caliber 8500 Co‑Axial automatic movement. As documented in the Omega 8500 technical manual, this screw (reference 3535, short version) is used to secure the pre-assembled wheel train bridge during movement assembly. It is an essential part for professional movement servicing and restoration, ensuring correct fixation and stability of the wheel train system.
Genuine Omega part – authentic Swiss-made component for Caliber 8500
Wheel train bridge screw – secures the pre-assembled wheel train bridge
Critical for assembly – ensures proper fixation of the wheel train system
Service replacement part – recognized in official Omega technical documentation
Precision-engineered – manufactured to Omega’s factory specifications
Part Number: 7228500A3535 (also listed as Ref. 3535)
Compatible Movement: Omega Caliber 8500 (includes 8500A, 8500B, 8500G variants)
Movement Diameter: 29.00 mm
Movement Height: 5.5 mm
Jewels: 39
Frequency: 25,200 vph (3.5 Hz)
Power Reserve: 60 hours (two series-coupled barrels)
Escapement Type: Co‑Axial
Screw Type: Short version for wheel train bridge
Position: Wheel train bridge
Origin: Switzerland (Omega factory part)
Quantity: Single piece
Condition: Brand new
Service and overhaul of Omega Caliber 8500 movements
Wheel train bridge assembly – securing the bridge during reassembly
Wheel train system restoration – ensuring correct screw tension and fixation
Restoration of De Ville Hour Vision, Seamaster Aqua Terra, Constellation, and other 8500‑powered models
Suitable for professional watchmakers and authorized service centers
1. Is this a genuine Omega part?
Yes, this is a genuine Omega factory part (reference 7228500A3535), manufactured in Switzerland. It is identified in the official Omega 8500 technical manual as “Screw for wheel train bridge” (short version, Ref. 3535).
2. What is the difference between the short and long wheel train bridge screws?
The Caliber 8500 uses both short (Ref. 3535) and long (Ref. 3534) screws for the wheel train bridge. The short screw (3535) is used for one position, while the long screw (3534) is used for another position on the bridge. Both are required during the wheel train bridge assembly stage.
3. Which movement versions is this screw compatible with?
This screw is compatible with Omega Caliber 8500 series, including variants 8500A, 8500B, and 8500G. The 8500 movement is used in models such as the De Ville Hour Vision, Seamaster Aqua Terra, and Constellation.
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