Cosmic triple date

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Thanks for the help so far!
What do you guys think about the service story?

I'd consider it unserviced.

To paraphrase what more intelligent people here have said for a while, if there is no documentation then consider it unserviced. Plus, 5 years is long enough to assume that it will need a service in the very near future, even if it was serviced 5 years ago.
 
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There are Swiss gold hallmarks (head + 750) and the hallmark with hammer head for the casemaker.
The number 132 in the hammer head indicates the casemaker Eric Monnier from La Chaux-de-Fonds (Switzerland), registered 21.07.1934
This case is also Swiss made by the casemaker Jung & Cie La Chaux-de-Fonds, registered 21.07.1934, indicated by the number 128 in the hammer head hallmark for the casemaker.
THIS is the way to refute wrong information. 馃憤馃憤
Simply telling someone they're wrong or telling them not to participate in the discussion is not helpful.
 
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The case is definitely a swiss made case.

There are Swiss gold hallmarks (head + 750) and the hallmark with hammer head for the casemaker.
The number 132 in the hammer head indicates the casemaker Eric Monnier from La Chaux-de-Fonds (Switzerland), registered 21.07.1934

Thanks for this info! Is there a database or source where I could have found this myself?
 
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Strange...never seen before Omega cases without reference number on the case back...
 
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Strange...never seen before Omega cases without reference number on the case back...

Many early omegas usually the precious metal cases- think late 1930s up to the early 1950s did not have a case reference number in the inner caseback.
 
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Thanks for this info! Is there a database or source where I could have found this myself?

Read this - valuable information
 
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Many early omegas usually the precious metal cases- think late 1930s up to the early 1950s did not have a case reference number in the inner caseback.
Thank you...and the serial number outside the case back?
 
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That has also been seen albeit rarely.