That's too much of a hassle IMO.

Just buy a quartz. Seiko has a number of great cases/designs with quartz and solar in the catalog to pick from. Eco-Drive from Citizen also.

 

I like the concept since my recent "5" experience made me into a quartz only guy. You'll probably remain "overly frustrated" I'm afraid.

 

No point. The 6R35 is not adjusted from the factory and by some accounts, isn't oiled very well. A proper service will address this for the most part and leave you with a well-adjusted watch that also has the movement it came with.

Alternatively, if you must, swap it for a 6R15. They seem to have a slightly better reputation. You should get that serviced before installing it too, as it's also prone to poor running if it's not lubricated properly.

 

Alternatively, if you must, swap it for a 6R15. They seem to have a slightly better reputation.

That is a very brave statement.

 

Not a 100% but I think the 4R is a direct swap. I realize less run time but the 4R/NH35 is cheaper and I think more reliable than the infamous 6R with its problems. You could enjoy your watch and it’s certainly less worry than a Rolex on your wrist as a sports watch. The swap makes it into a more, no worries, be happy, mode. No quartz please.

 

I get it, but after owning a number of solar quartz including an excellent Chronomaster, I really want a name brand diver with reliability. It's odd to me that the watches supposed to take the most beating underwater predominantly are mechanical and less reliable. What are your recommendations for 40mm diameter / 12mm thick high-quality finished quartz or solar quartz divers??? I basically want a submariner or MM200 that doesn't need servicing.

 

I understand no muss no fuss with a quartz. I just like that an automatic is more organic? Alive? Lol
They require interaction. Quite a few Seiko’s and the one that tells near perfect time is an NH35? Luck of the draw I guess? I never wear the same watch two days in a row so I hack and hand wind each when I fire one up. I don’t have many that gain but the average loss is maybe 5 seconds a day.

 

Lots of great Quartz divers out there…pick one you like that suits your wrist size and your wallet depth.

 

Seiko has the famous Tuna and various solar quartz divers, and Citizen has some affordable eco drive divers that are pretty nice. I’ve never heard of a quartz movement that can be dropped in place of a 6r35. Also, I speak from personal experience when I say the 6r15 (or any of the inexpensive dove mechanical Seiko movements) will also leave you frustrated, so ignore advice to swap the 6r35 for another mechanical Seiko movement.

 

Your personal experience trumps all others, then?

As explained, a ground-up service will be beneficial for any movement, and if the OP can source a serviced, good-running 6R15 to an all-over-the-place 6R35, that is probably the only solution for keeping the same watch case. Then again if going to all that expense, just servicing the movement it already has is also an option.

Maybe a 4 o'clock movement from a solar Tuna will fit. But the crown on those is bang on 4 o'clock. The OP's 6Rs will be at 3.45, 4.18 and so on. Also, the date wheels on that movement are completely different to the 6Rs, so you can't swap them over. And I doubt the stem height is the same.

Esslinger has loose V157s for $166 before any taxes, feels, costs, duties, levies or disbursements if the OP fancies a punt. Here's the dial side of a 6R15.

And the dial side of a V157.

 

Seiko do some really nice quartz divers. The Tuna ain’t never going to be 40mm but before you call me rude names give one a go as you might be pleasantly surprised they are so short of lug.

 

I'd assume a 7548 movement would be a direct swap? These a really neat movements for a quartz. Serviceable, too.

The ones I have have the crown at exactly 4 o'clock, though. May require some date wheel swaps. Sounds like a project.

 

Before going the 6R35 to quartz movement swap, echoing a similar sentiment to what @One-Seventy posted that some have found poor oiling work from the factory. Getting it serviced may be worth a look. I’ve heard of members mentioninhg good accuracy with the 6R35 recently. The no-date 6R31 gets near 0spd in my KS with little to no isochronism.

 

Not sure I am playing by the rules? The 6R movement stem, the case also, is not at a true 4:20 position. As posted above in #7 post, you have information about mechanical movements that would be a better choice. Not sure of any Quartz Watches that have the correct crown position to swap in a Quartz movement with your case? If your Watch was a true 4:20 crown position Watch, a great swap would be to use a 7548 Quartz movement.

Would I swap (trade) my Quartz 7548 Watch for your 6R movement Watch? Probably not. Vance.

 

Not sure why anyone would think a 7548 would swap in for a 6R15. They have pretty much nothing in common.

There aren't any easy swap quartz movements that will fit a 6R15 case. You'd have to do a lot of customization work on the case and replacement movement to make it work, which is more trouble than it's worth.

If you want a quartz Seiko diver, just buy one.

 

Seems like a problem for a set of calipers and some CAD time, then send it to a 3D printer like shapeways to make a custom movement holder.

Sorry if that’s not what you want to hear. This off the beaten path stuff though. You wanna blaze a trail, you’re gonna need a machete. It’s where the fun starts. 😎

 

The future is now! Can I adapt? Lol

 

As I mentioned, the impetus is to get something reliable. Even after one horrendous 6r35 swapped out for new by seiko Tokyo, positional accuracy is still 60 seconds across axes. Yes if I wear it every day and put it in a weird position overnight I can get it within 5 seconds a day but come on! For a $1500 watch? I have a sur307 for $150 that is wonderful but show me the high quality dressy diver at $1500. Hence the movement question. Most quartz movements are tiny and use a plastic spacer. I was hoping to make one and modify either my existing mm200 or just buy a $100 case off aliexpress. The damn pagani Daytona is a superb case for under $100. I don’t understand why a name brand like seiko can’t offer the same.

 

I also wonder why all the world's brands don't personally offer me the watch that I, personally, want - even without me communicating it to them. It's, like, so annoying

Seiko makes a few divers with Solar, just get one of those. But I'd recommend selling all your Seikos and looking at other brands from now on, it will be less frustrating that way.

 

Just buy a Seiko SUS Quartz or something.

 

I feel your pain with the 6R35, OP. I've had three in a row with poor timing, wacky positional changes and one whose PR topped out at 37 hours.

I'm not bothered with this latest one, but will get it serviced at some point, hopefully then it's less funky.

 

I’m a little surprised there isn’t a quartz movement out there that can be swapped into various seikos. I suppose the market just isn’t there.

i love my autos, especially the ones that run well. However I also have an appreciation for the care free nature of a quartz watch too