Watchmaker Compares Omega Calibres 1120-2500-8500

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tempusmaximus
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Watchmaker Compares Omega Calibres 1120-2500-8500

Post by tempusmaximus »

This article looks at a watchmakers thoughts on the movements used in the Omega Seamaster over three generations. One of the old standard sort with a calibre 1120 , an early Planet Ocean with a 2500 co-axial cal and the latest generation in house one with an 8500 co - axial cal.

http://www.ablogtowatch.com/watchmaker- ... 2500-8500-
movements/

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Re: Watchmaker Compares Omega Calibres 1120-2500-8500

Post by smegwina »

Cheers Bern.

Very interesting!

I knew some history, but I did not realise the degree to which the 2500 was a **** ETA with a co-axial shoehorned onto it. - I rather like that. A trailblazer if you will.

In so many ways, the 8500 is a solution to a problem that never existed, yet Omega persevered with it and made it their own. (With their associated issues, such as the oiling)

I was hoping that the article may answer a question that jas been puzzling me. In that if the 8500 has the silicon mainspring, which is immune to magnetism, why the need for a 'master' version? are other parts susceptible?
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Re: Watchmaker Compares Omega Calibres 1120-2500-8500

Post by tempusmaximus »

Nick , the Omega calibre 8508 is an updated and improved version (anti - magnetic)of the cal 8500 , so im assuming that certain parts of the 8500 may have been susceptible . :D


I believe the 8508 uses non-ferrous metal parts in the movement .The 8500 could have used some parts that was ferrous(some iron content )but im only assuming this .
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Re: Watchmaker Compares Omega Calibres 1120-2500-8500

Post by biglove »

In my opinion, the 8500 is ridiculously overpriced vs the 2500 for minimal improvements in accuracy and service interval.

Not that I wouldn't own one, but I will take a 2500 used over the newer take any day and at nearly 1/2 the price used 2500 vs used 8500.
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Re: Watchmaker Compares Omega Calibres 1120-2500-8500

Post by nbg »

Thanks Bernie. An interesting read for a novice like me.

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Re: Watchmaker Compares Omega Calibres 1120-2500-8500

Post by Lavaine »

An interesting read. I did not know that the 2500 was a modified ETA, not a new in-house movement. The things you learn on the internet.
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