Another Eterna Matic 1000 Question

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Hello watch enthusiasts. I’ve added this new (to me) Eterna Matic 1000 which I’ve dated to circa 1967. It has a stainless steel case with gold bezel. It’s stamped five star on the back. It has an unusual diamond pattern on the underside of the crystal. I’ve never seen that before and wonder if it’s original? Other than that the watch appears to be all original. What are the groups thoughts?
 
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Can you show the pattern you're referring to? Eterna crystals had the five ball bearing pattern. You can see it pretty clearly here.

 
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Thanks Dan. If you look at the upper photo of the watch face you can see the lines of the diamond pattern on the underside of the crystal. I can’t see any other markings.
Hello watch enthusiasts. I’ve added this new (to me) Eterna Matic 1000 which I’ve dated to circa 1967. It has a stainless steel case with gold bezel. It’s stamped five star on the back. It has an unusual diamond pattern on the underside of the crystal. I’ve never seen that before and wonder if it’s original? Other than that the watch appears to be all original. What are the groups thoughts?
 
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OH! Sorry, I was looking at the wrong things. It looks like a shadow. Is it a faceted crystal?
 
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Can you show the pattern you're referring to? Eterna crystals had the five ball bearing pattern. You can see it pretty clearly here.

OK now I get it. No, I don’t see the five dots in the center of the crystal. This crystal is nice and clean and clear so I can’t imagine replacing it at least for now but the diamond pattern is somewhat distracting when viewing the time! I’m not sure why anyone would want that!
 
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OH! Sorry, I was looking at the wrong things. It looks like a shadow. Is it a faceted crystal?
Yes has a faceted effect.
 
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I love the case-back. Very space-age. 👍
 
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Yes has a faceted effect.
OH! Sorry, I was looking at the wrong things. It looks like a shadow. Is it a faceted crystal?
Yes it has a faceted effect and sorry for the multiple responses, I’m still getting used to how this forum message tool works. ‍
 
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Yes it has a faceted effect and sorry for the multiple responses, I’m still getting used to how this forum message tool works. ‍
I love the case-back. Very space-age. 👍
Cool! Do you think this faced crystal is original? I’ve never seen it before on any watch.