Good morning,
Yesterday I found this Omega vintage watch in an old box. Now I am a total layman when it comes to watches, especially omega watches. That is why I want to find out more about the authenticity of the watch on this forum.

I myself think it is a fake, the following three things stand out to me:
1. The watch has a 'Seamaster' dial, while it has a 'Speedmaster' back.
2. The second hand is missing.
3. The words "-SWISS MADE-" are placed above the minute marks, instead of below them.

Can someone please help me out here?

 

Well done with your assessment, it is indeed a fake, or more correctly, a counterfeit.

 

I’d take the back off that and look closer. Omega did sell a non chrono model marked Speedmaster at one point. Not saying this is it but it’s not an impossibility based on the front and back markings alone.

 

Good assessment! Indeed fake.