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The Omega 8500 Movement Date Indicator (7228500A9144B04) is a genuine Swiss-made component for the Omega Caliber 8500 Co‑Axial automatic movement. This date indicator is a critical part of the calendar mechanism, displaying the current date through the dial window. It is listed as a service part in the official Omega 8500 spare parts list under reference 9144.
Genuine Omega part – authentic Swiss-made component listed in official technical documentation
Calendar mechanism component – displays the date through the dial window
Precision-printed numerals – clear and legible date display
Service replacement part – recognized in official Omega 8500 spare parts list
Part Number: 7228500A9144B04
Compatible Movement: Omega Caliber 8500 (Co‑Axial automatic)
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)
Date Display: Window at 3 o’clock position
Origin: Switzerland (Omega factory part)
Condition: Brand new
Service and overhaul of Omega Caliber 8500 movements
Calendar mechanism repair – replacing worn, faded, or damaged date indicators
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 7228500A9144B04), manufactured in Switzerland. It is listed in the official Omega 8500 spare parts list under “Date indicator”.
2. What is the difference between 7228500A9144B04, D02, and E24?
These are all genuine Omega date indicators for the Caliber 8500, with different color variants indicated by their suffixes:
B04 – specific color variant (please check with your supplier)
D02 – white date disc with black numerals
E24 – another color variant
Please verify your specific reference with the official Omega parts list.
3. What is the function of the date indicator?
The date indicator is part of the calendar mechanism that displays the current date through the dial window at the 3 o’clock position. It is driven by the date indicator driving wheel during the date change at midnight.
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