Considering purchasing a vintage Omega watch on Chrono24

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Something I've noticed, the guard around the movement looks to be plastic but is stamped, METAL. Any thoughts?

It is the inner ring case. Makers use these rings to reinforce gold cases - gold is a soft metal. They have to be stamped "metal" in France and Switzerland in order to not be confused with gold.

So this is normal!
Edited:
 
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Something I've noticed, the guard around the movement looks to be plastic but is stamped, METAL. Any thoughts?

Unfortunately, Toronto, Canada don't have much of a watch base with helpful insight.


I noticed that too. I found it odd, but I don’t know enough about this reference.