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The Omega 8500 Movement Intermediate Escapement Wheel (7228500A30039) is a genuine Swiss-made component for the Omega Caliber 8500 Co‑Axial automatic movement . This intermediate escapement wheel is a critical part of the Co‑Axial escapement system, working with the co‑axial wheel and pallet fork to transmit impulses from the gear train to the balance, enabling stable energy transfer and consistent timekeeping . It is a recognized service part listed in the official Omega 8500 spare parts list for version 8500A .
Genuine Omega part – authentic Swiss-made component listed for Caliber 8500A
Co‑Axial escapement component – works with co‑axial wheel and pallet fork for impulse transmission
Critical for stable timekeeping – ensures consistent energy transfer to the balance
Service replacement part – recognized in official Omega technical documentation
Precision‑engineered – manufactured to Omega’s factory specifications
Part Number: 7228500A30039
Compatible Movement: Omega Caliber 8500A
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)
Origin: Switzerland (Omega factory part)
Condition: Brand new
Service and overhaul of Omega Caliber 8500A movements
Co‑Axial escapement repair – replacing worn or damaged intermediate escapement wheels
Timekeeping restoration – ensuring consistent rate and amplitude
Restoration of De Ville Hour Vision, Seamaster Aqua Terra, 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 7228500A30039), manufactured in Switzerland. It is listed in the official Omega 8500 spare parts list for Caliber 8500A under “Intermediate escapement wheel” .
2. Which movement versions is this component compatible with?
This intermediate escapement wheel is specifically listed for Omega Caliber 8500A in the technical documentation . For other versions (8500B, 8500G, and 8900), different references may be required. Please verify your movement version before ordering.
3. What is the function of the intermediate escapement wheel in the Co‑Axial system?
The intermediate escapement wheel works with the co‑axial wheel and pallet fork in the Co‑Axial escapement system to transmit impulses from the gear train to the balance . It is a key component in the co‑axial mechanism that reduces friction and improves long‑term accuracy compared to traditional lever escapements.
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