Is this 1940s Omega with an unusual 18 k case original?

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Hi, my daughter has asked me about this 1940s Omega and I need your help. As the photos show it has a scalloped 18k case I've never seen before. The inside case back markings would indicate it is original but something makes me suspicious, especially given the all-too-polished condition. So welcome your thoughts on the whole watch-- case, crown, movement, and dial.

 
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Photos of the case back, both sides, and how the movement is set in the case, should reveal the answer.
 
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An Omega "Bottle Cap" from about 1950.

Example here.

 
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Wondering if old refinish. 5:00 index protruding into the chapter ring. 7:00 correct
 
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Photos of the case back, both sides, and how the movement is set in the case, should reveal the answer.
Thanks, @ Tony C. Are you able to see the additional photos i posted?
 
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An Omega "Bottle Cap" from about 1950.

Example here.

Thanks, JimInOz!
 
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DON DON
Wondering if old refinish. 5:00 index protruding into the chapter ring. 7:00 correct
Thanks DON
 
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IMO all original except the crown which is probably a later replacement.
Case is a bit polished but overall a nice looking watch
 
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I am not an expert, but it appears to be a genuine FRENCH case. I'll leave it to the experts to opine on possible refinishing.
 
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I am not an expert, but it appears to be a genuine FRENCH case. I'll leave it to the experts to opine on possible refinishing.
I think it is Swiss made. The key hallmark marked 29 indicates Weber & Cie is the case maker.
 
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I am not an expert, but it appears to be a genuine FRENCH case. I'll leave it to the experts to opine on possible refinishing.
There is the Helvetia head hallmark clearly visible, so it should be a Swiss case.
 
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I think it is Swiss made. The key hallmark marked 29 indicates Weber & Cie is the case maker.
Yes, my mistake, you are correct.
 
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She found it at a dealer. I told her I thought what they were asking- -some $4 k-- was easily 2x its value. What do you think?
 
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And yet no Swiss or Swiss Made text 🤔
 
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And yet no Swiss or Swiss Made text 🤔
So are you thinking it has been recased?
 
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She found it at a dealer. I told her I thought what they were asking- -some $4 k-- was easily 2x its value. What do you think?
I recognise the pictures - all dealers have some signature shots! All of his watches are nice, but also expensive - like most dealers. The watch shows as sold on their site. Did your wife get it?
 
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I recognise the pictures - all dealers have some signature shots! All of his watches are nice, but also expensive - like most dealers. The watch shows as sold on their site. Did your wife get it?
And yet no Swiss or Swiss Made text 🤔
Any thoughts on @padders suggestion that this might be a redial? Also, the seller indicates it is a Cal. 266. Is that correct?
 
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Also, the seller indicates it is a Cal. 266. Is that correct?
No, definitely not! This cal 28 (later called 360) is often mixed up with movements out of the 30mm family at a superficial glance.
It is easily discernable by the smaller size and the wide facet at the rim by people who know their stuff...
 
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No, definitely not! This cal 28 (later called 360) is often mixed up with movements out of the 30mm family at a superficial glance.
It is easily discernable by the smaller size and the wide facet at the rim by people who know their stuff...
Thanks, Mac_Omega. I really appreciate it. As always, I value what I can learn from OF and am glad to share it with my daughter this time.