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The Omega 8500 Movement Date Indicator Driving Wheel (7228500A33020) is a genuine Swiss-made component for the Omega Caliber 8500 Co‑Axial automatic movement . As a key part of the date mechanism, this driving wheel transmits motion from the intermediate date wheel to rotate the date indicator, enabling smooth and precise date changes . It is a recognized service part for the 8500A movement version and is typically replaced during professional servicing when wear or irregular date‑changing behavior is detected .
Genuine Omega part – authentic Swiss-made component for Caliber 8500
Date mechanism component – transmits motion to rotate the date indicator
Precision-engineered – manufactured to Omega’s factory specifications
Service replacement part – listed in official Omega technical documentation
Direct replacement – designed for professional servicing and restoration
Part Number: 7228500A33020
Compatible Movement: Omega Caliber 8500A
Movement Diameter: 29.00 mm (12¾”’)
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
Date mechanism repair – replacing worn or damaged date indicator driving wheels
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 7228500A33020), manufactured in Switzerland. It is listed in the official Omega 8500 spare parts list as “Date indicator driving wheel” for Caliber 8500A .
2. Which movement versions is this component compatible with?
This date indicator driving 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. The Caliber 8500 is used in models such as the De Ville Hour Vision and Seamaster Aqua Terra .
3. What is the function of the date indicator driving wheel?
The date indicator driving wheel is part of the date mechanism that transmits rotational force from the intermediate date wheel to the date indicator, allowing the date to advance smoothly at midnight . It works in conjunction with the date jumper to ensure proper date alignment .
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