Seiko (nearly) 3-day movement

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straps68
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Seiko (nearly) 3-day movement

Post by straps68 »

So there is this pretty new Seiko movement with a 70hr power reserve, the 6R35. Very impressive!

Most recently, It's found its way into the new Alpinist watches and some Presage models as well.

The new Sumo, SBDC083 has it, too.

My guess is that this new movement will replace the 6R15 in all the models that currently use it.
6R35-1.jpg
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Tanukjaju
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Re: Seiko (nearly) 3-day movement

Post by Tanukjaju »

I think I only have 1 seiko based watch.....

Are these a good option when building a homage? Is the offset and specs similar to a 2824? Are the movements available easily?
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Re: Seiko (nearly) 3-day movement

Post by straps68 »

I don't think the new movements are available easily, yet. You can find some NH35's easily enough.

Here some specs for an older movement, the new ones should be similar. I found that the 4R35(same as NH35) is 5.3mm high.

7S26B:
Dm= 27.0mm, Do= 27.4mm
H= 5.0mm (ball bearing +0.15mm, dial spacer +0.25mm)
F= 1.65mm
T= 1.75mm
Hands: 1.50 x 0.90 x 0.20mm

2824-2:
Dm= 25.6mm, Do= 26.0mm
H= 4.6mm (H= 4.7mm with ball bearing)
F= 1.2mm
T= 1.8mm
Hands: 1.50 x 0.90 x 0.25mm

F - mounting height, distance between dial plane* and mounting flange.
T - stem height, distance between dial plane* and stem center.

Although the hour and minute hands are supposed to be the same but I have read that they are actually not. I remember reading that the Seiko hour hand is acttually 1.51 or so and the minute might be 0.89.
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Re: Seiko (nearly) 3-day movement

Post by TimemiT »

70 hour PR .. sounds similar to PR of the new in-house Tudor movements

assuming it's housing a much larger spring?
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straps68
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Re: Seiko (nearly) 3-day movement

Post by straps68 »

TimemiT wrote: January 19th, 2020, 11:49 am 70 hour PR .. sounds similar to PR of the new in-house Tudor movements

assuming it's housing a much larger spring?
That would be my guess.
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Mellons
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Re: Seiko (nearly) 3-day movement

Post by Mellons »

Any More images of movement? Lots of modders hand sets available for seikos out there
"Ah, I'd love to wear a rainbow every day,
And tell the world that everything's OK,
But I'll try to carry off a little darkness on my back,
'Till things are brighter, I'm the Man In Black."

http://www.homage-forum.com/viewtopic.php?t=27
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Re: Seiko (nearly) 3-day movement

Post by straps68 »

Mellons wrote: January 20th, 2020, 9:54 am Any More images of movement? Lots of modders hand sets available for seikos out there
Can't find much out there but here's a couple:
6R35-2.jpg
6R35-3.jpg


Here is a good pic of 6R15, which is nearly identical as far as I can tell:

6R15-1.jpg
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Mellons
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Re: Seiko (nearly) 3-day movement

Post by Mellons »

Looks well finished
"Ah, I'd love to wear a rainbow every day,
And tell the world that everything's OK,
But I'll try to carry off a little darkness on my back,
'Till things are brighter, I'm the Man In Black."

http://www.homage-forum.com/viewtopic.php?t=27
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