[Sigfortunata]

Is it possible to swap the date wheel from a 7002 movement onto a 7S26 movement so that the if the 7S movement is transplanted into a 7002 case with the crown at 4 the dates will line up?

Problem I have at the moment is 7S movements fit perfectly into to 7002 cases but because the 7S has the crown at 3:18 I an only use none date dials

Thanks

 

[ivorbiggin]

No they wont interchange.You have to find a 7s with a 4'oclock crown (Hens teeth) and use the date wheel from that
You can use a dateless dial or swap the 7002 movement for any other 70xx and then swap the date wheel

 

[7s26b]

To add a little, not all 7S discs line up the same, the 7S "C" spec discs are aligned slightly differently - so the numbers sit lower . You can see the difference in the pics - 7S/C at the bottom. Pictures from http://members.iinet.net.au/~fotoplot/seiko7005/s7005.html and http://q-m.org/2012/11/10/seiko-watch-movement-part-3/

 

[Sigfortunata]

Could I use a 7009 movement to replace a 7002? I understand the 7009 is the same as a 7002 but has day/date instead of just date.

Is 7009 crown at 4 or 3:18?

 

[7s26b]

Could I use a 7009 movement to replace a 7002? I understand the 7009 is the same as a 7002 but has day/date instead of just date.

Is 7009 crown at 4 or 3:18?

Ivorbiggin has already answered this
http://www.thewatchsite.com/34-watc...94-7002-7s26-date-wheel-query.html#post977866

 

[ivorbiggin]

Could I use a 7009 movement to replace a 7002? I understand the 7009 is the same as a 7002 but has day/date instead of just date.

Is 7009 crown at 4 or 3:18?

Yes, the 7009 mainplate is almost identical to the 7002. The 7009 has a thread tube for the day quickset finger and a stud for the day quickset spring that the 7002 doesn't have., other than that they are the same.

It doesnt matter where the crown is positioned on the 7009, just swap over the date wheel for the 7002 one and it will align with the 7002 dial.
I believe that some 7009's have a shorter fourth wheel pinion and hour wheel, depending on model, if so the 7002 hour wheel and fourth wheel will interchange.

 

[mwbuss8]

I have a 7002 date wheel on a 4r35 movement. It changes over fine with the time, but the quickset doesn't always work right. I'm confident it could, I just haven't gotten around to taking the whole thing back apart to fiddle with it.

 

[7s26b]

I have a 7002 date wheel on a 4r35 movement. It changes over fine with the time, but the quickset doesn't always work right. I'm confident it could, I just haven't gotten around to taking the whole thing back apart to fiddle with it.

So what you're saying is - it will work, but not reliably?
I think it was shown in an earlier post with pictures, that the mechanism isn't really compatible, mechanically or materially - as you now have spring/stainless steel wearing against an alloy disc, as opposed to plastic against metal.
http://www.thewatchsite.com/21-japa...890-help-me-understand-skx171.html#post775730

 

[doubleaphtk]

Is it possible to swap the date wheel from a 7002 movement onto a 7S26 movement so that the if the 7S movement is transplanted into a 7002 case with the crown at 4 the dates will line up?

Problem I have at the moment is 7S movements fit perfectly into to 7002 cases but because the 7S has the crown at 3:18 I an only use none date dials

Thanks

this is not needed. a 7s26 or nh35 will fit perfectly and little bit of ingenuity you can make it work as I have.

happy to jelp if you are still struggling with the idea (pm me)