Omega Caliber 8500

Omega Caliber 8500

Omega Caliber 8500

BrandOmega
Caliber Number8500
Movement TypeAutomatic
In-House?Yes
Jewels39
Power Reserve60 hours
Vibrations Per Hour25,200bph
HairspringSilicon Si14
Shock SystemNivachoc
Hacking?Yes
Hand-Windable?Yes
FeaturesCo-Axial Escapement, date
Country of ManufactureSwitzerland
Known Models231.10.42.21.01.001

The Omega caliber 8500 is an in-house automatic movement. The rotor winds in both directions to reduce winding time. Power reserve of 60 hours. Swiss made. The pictures below are from an Omega Seamaster Aqua Terra Golf Edition and a newer style Planet Ocean XL.

The 8500 equipped with Co-Axial Escapement for “greater precision, stability and durability” according to the Omega website.

Is the Omega caliber 8500 in-house?

This questions reappears constantly in the watch community. Omega calls the 8500 and in-house movement, however, many enthusiasts are hesitant in giving this designation to the movement since the movements are apparently made by ETA with Omega (Co-Axial) designs and technology. But ask yourself this, if the conglomerate Swatch Group owns Omega and also owns ETA, does that mean any proprietary movements made by ETA for Omega could be considered “in-house” since they basically live under the same roof (Swatch)?

We do know for certain that Omega’s “in-house” caliber 9300 was made in ETA factories.

8500 Gallery:

Video:

Additional Resources:

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Wallace
Wallace
9 years ago

In-house. Nice. Worth $10k? Rolex me.

calibercorner
calibercorner
10 years ago

A barrel is essentially a drum holding the mainspring – the proportion of which has effect on the watch’s power reserve capacity. Being equipped with two barrels allows for more power reserve.

DavidU
DavidU
7 years ago

28 jewels ? It has 39.

Jimmy
Jimmy
7 years ago

When I see these in-house Omega movements I always think they could have made them look nicer. I feel the same about the Panerai in-house stuff too. Maybe I’m expecting too much for a $8,000-12,000 watch?

Steven
Steven
6 years ago
Reply to  Jimmy

It’s beautiful…and $6500. Blows Rolex away.

Geth Sodin
Geth Sodin
4 years ago
Reply to  Jimmy

Maybe so, but at least Panerai and Omega shows the goods. Rolex covers it up.

wahi bin abdua
wahi bin abdua
7 years ago

i’m question? omega si14

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David McReynolds
David McReynolds
1 year ago

231.10.42.21.02.002

Khalid
Khalid
11 months ago

I need pallet fork for omega calibre number 2500.co axial if you have inform me with price

IMG-20230726-WA0011.jpg
IMG-20230726-WA0009.jpg
Steph
Steph
9 months ago

The co-axial escapement was invented by George Daniels and patented in 1980 with Omega adopting it under license (or took advantage of the patent running out) in 1999 when they ‘adopted’ it as their own.

Joe
Joe
3 months ago

The rotor winds in both directions to reduce winding time.”

I’ve seen a video showcasing an Omega De Ville with this movement and it seemed as if they were winding the crown back and forth, clockwise and counter-clockwise. Is this what you mean here? I’ve only manually wound a watch going clockwise.

Joe
Joe
3 months ago
Reply to  calibercorner

Thanks for that. Just so you can see it, here’s the video at 1:29 where he starts winding it normally, then see what he does:

https://youtu.be/xRQoYxj9vHM?t=89

Quang
Quang
2 months ago

Rolex 4130 is the BEST ( Omega cal 8500 HAIR SPRING is NIGHTMARE )

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