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Correct case back Seamaster 300?

V
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Hi, according to Arne Rasmussen early models have rounded edges while later ones have sharp edges. Question is what the timespan is to be regarded as early models?

I've seen SM:s from 64-66 with HF casebacks(sharp edges).
Imho, if Omega used HF and CB casebacks within various time periods an early SM with HF caseback would be correct.

http://thatwatchandmore.blogspot.com/2013/03/buying-vintage-omega-seamaster-300.html?m=1


Thanks.
Edited:
 
cristos71
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You might want to use some photo's to illustrate your point/question. I for one don't understand what exactly it is that you are asking...
 
V
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Basically I would like to point out that an early SM could have a sharp edged case back and still be correct since there was two companies commissioned for the production. Have a look at Arnes blog about case backs. There you can see the differences. And imho I think the difference, edgy dubble steps vs. round edge is more attributable to the manufacturers rather than earlier or later models within 62-68.
 
Vitezi
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V Vintage Rob
Hi, according to Arne Rasmussen early models have rounded edges while later ones have sharp edges. Question is what the timespan is to be regarded as early models?
I don't think I've ever seen a definitive roundup of SM300 cases vs. production date/serial number. This seems like a good opportunity for original research! There are many threads on the SM300 on this forum; why not spend some time searching for posts with photographs of serial numbers and casebacks, log them in a spreadsheet, and report your findings back here?
 
Dan S
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Vitezi Vitezi
I don't think I've ever seen a definitive roundup of SM300 cases vs. production date/serial number. This seems like a good opportunity for original research! There are many threads on the SM300 on this forum; why not spend some time searching for posts with photographs of serial numbers and casebacks, log them in a spreadsheet, and report your findings back here?

I suspect that @Vitezi may be in the education field. 😉
 
Vitezi
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I am hoping for a little class participation here 👍.
 
V
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Yes of course, although the pics in the link shows the difference. However, I just found it a bit odd that Arne, whom has very good knowledge about vintage SM:s, did just mention early and later time periods and not taking into consideration the possible difference in shape between HF and CB casebacks. A correct answer, if possible? is always a plus avoiding frankens. I wonder if anybody with good knowledge about it could reply. As part of my own research I havent been able to trace an answer regarding this matter so far. Thanks
Edited:
 
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