I know you wanted 'expert' opinions... but here are some comments on the pictures you provided.
Yes, looks like the 'star' has 'fallen off' and been reglued (and not done very well). you can even see some 'marks' under the Star
on the dial surface itself.
I also noticed that the 'battons' at the 12 noon poston are also not aligned with each other.
seems to be poor quality if in fact, the Omega factory did this.
I searched online (images) across a hundred or so Omega Constellations (of all types) and never saw any that 'exactly' match
this 'dial, hands, battons'
again, just my observations.
Cheers
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