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Upgrading a Seiko's watch movement

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mrk
 mrk
Posts: 3
Active Member
Topic Starter 4 months ago
 

Hello,

I have an old Seiko watch for some time now, I really like the basic/sober stainless steel design of the watch, but I have been thinking about 'upgrading' the internal movement. 

My old Seiko watch holds a caliber 4R35. Is it possible to replace the caliber with a more advanced one? How advanced can I go? Does the S9 series have an equivalent? Let's take the S965, should I watch out for thickness and dimensions? Are there plastic inserts available to cope with size differences? Is there a 3D printing community around modding watches? And lastly -- assuming that all previous questions are positive -- where can I get a high end S9 caliber?

 
Dryfly
Posts: 5
Active Member
2 months ago
 

Are you speaking of an Apple watch quartz movement? (S9 series) Or are you perhaps referring to a Grand Seiko 9s65 mechanical movement? They are very different things. If you are talking about the quartz movement I know nothing about it.

If you are talking about a Grand Seiko 9s65 movement, it is a superb movement, one of the best you can get in my opinion. But I am reasonably sure that it is not something that you can just purchase, and it almost certainly wont fit in your watch.

 
mrk
 mrk
Posts: 3
Active Member
Topic Starter 2 months ago
 

My bad, I was referring to the 9S (not S9 :sweat_smile:). I was planning to buy a cheap 9S watch for 2.5k price range and take the caliber out to put in an older Seiko watch which has a 4R35 movement as I would like to give it an upgrade. My old watch has sentimental value but I would just rly love to have an upgraded caliber.

You saying this is not possible? what other options do I have? Would I need to switch the full watch case or can I maybe keep the dial or something?

 
Dryfly
Posts: 5
Active Member
2 months ago
 

Hey mrk. I think a GS with that movement starts at about 4.5k, you may or may not be able to find a used one worth having for 2.5k. I think if you are going to do this it would be easier to just switch dials if you can find a GS with the same dial diameter. Not sure if you quite realize it or not but this would be a massive upgrade, 4r and 9s movements are on complete opposite ends of the spectrum of movements. If you can find a GS with the same size dial then switching dials may be more doable.

A better option in my opinion would be to go for a Seiko 6r movement instead. It is still a huge upgrade from a 4r movement, and both movements come in very similar Seiko watches. I also believe that they are nearly identical in size, so a simple movement swap may very well be easily doable. A 9s is just enough of a different size to complicate things.

Grand Seiko and Seiko are pretty independent from each other which would also complicate things, sticking to just Seiko only would likely be much easier to do. Also switching to a 6r would cost a few hundred dollars, while switching to a 9s would cost thousands. Best of luck to you if you go for this.

 
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