Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327 
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Post by Adrian-VTA on Nov 17, 2019 7:32:41 GMT -8
Does anyone know what the differences are and where the extra jewel is?
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Nov 17, 2019 11:59:15 GMT -8
Actually, the "extra" jewel is on the main plate, and it's not new. The 6R15 gained the extra jewel on the main plate with the "C" versions back in 2012, so both the 6R15C and 6R15D had 24 jewels as well. Seiko didn't upgrade the dial text or rotor designations with the 6R15-powered watches likely in an effort to save costs.
I'm not sure what else has been upgraded on the 6R35 though. So far I've read that the differences lie mainly in the balance and mainspring. Looking forward to seeing a detailed tear-down of the 6R35 though!
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,663
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Post by HiBeat on Nov 17, 2019 13:49:04 GMT -8
From what I know the 6R35 features a power reserve of 70 hours as opposed to the 6R15 at roughly 42 hours. Seeing how the new 6R35 is still 21,600 bph as opposed to the 6R24 being 28,800 bph, I liken what they did to how Hamilton moved the beat rate down from 28.8 to 21.6 so as to increase their power reserve to 80 hours in certain models powered by their H30. I had one those it was brilliant but I moved it along.
I read that the 6R35 is a bit thinner but why or by how much I do not know.
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Nov 17, 2019 22:38:41 GMT -8
Yeah right. Maybe they used a different variety of SPRON mainspring? I just had a 6R15 apart and it's essentially identical to a 4R36, with the difference of the SPRON mainspring and hairspring. They could easily shave about 1mm off the movement with some small changes, so maybe they did that. I was hoping they jewelled the top arbor as well so I could order the jewels as parts. From what I know the 6R35 features a power reserve of 70 hours as opposed to the 6R15 at roughly 42 hours. Seeing how the new 6R35 is still 21,600 bph as opposed to the 6R24 being 28,800 bph, I liken what they did to how Hamilton moved the beat rate down from 28.8 to 21.6 so as to increase their power reserve to 80 hours in certain models powered by their H30. I had one those it was brilliant but I moved it along.
I read that the 6R35 is a bit thinner but why or by how much I do not know.
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