Advice needed: Search for my first vintage omega

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Hi all,

I have been doing some reading and though I have learnt a little on vintage omega I think it would probably be safer if I tapped on the collective knowledge of the forum community here.

I saw the following watch for sale and would like to get your opinions especially on the originality and what price would be fair for this.
 
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This is another one that I am interested in. Seek your inputs. Thanks.

To be honest, I’m not sure why there are Lume marks on the dial yet none on the watch hands. Is this potentially a red flag?

And I couldn’t find these two watches on the omega database. Or perhaps I am searching it wrongly? Could anyone enlighten me on the use of the omega database?
 
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The Calendar looks really nice to me and totally original. Wait and see if others agree. Expect to pay substantially more than the average for one in that condition.

The other one, less so. Those crosshairs do not belong on that dial. They are broken in the top half and don't line up with the 9 marker. Also your point about the lume is correct. Pass.
 
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Thanks. Anyway can anyone tell me whether a seamaster would definitely have a seamaster caseback logo? (the horse picture)

Also, does a constellation also meant the original caseback has to be the emblem thing, without which it is a imitation or replacement case?
Edited:
 
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Still looking for more opinions especially for the first watch. ^^