How to? NH35/36 into an SNZH5x case? - Seiko & Citizen Watch Forum – Japanese Watch Reviews, Discussion & Trading
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Old 04-23-2018, 11:54 PM   #1 (permalink)
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Default How to? NH35/36 into an SNZH5x case?

I am hoping that an NH35/36 movement is a straight drop in, to replace the 7s movement in the SNZH case.

From what I gather, I will need to replace the stem, but is it otherwise a straight drop in? (ie no need to change over the movement carriers etc?

Given the 3 o'clock crown position of the SNZH I would assume no need to change day or date wheels.

I plan to obtain the movement from CT https://crystaltimes.net/shop/all/movements/ct500/
it comes with a stem, is that the type that can be cut to length for use in this mod?


I gather the stem and crown on the SNZH can be separated, so I presume I can reuse the SNZH crown.

All advice very welcome. Cheers.

Last edited by vladtepes; 04-24-2018 at 12:13 AM.
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Old 04-24-2018, 04:35 AM   #2 (permalink)
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I’ve only ever done this in an SKX case, but you will likely need to swap the dial holding spacer ring, as well. The one that comes on the stock 7s26 movement should fit the nh36.

You will need a crown, in addition to the stem. May have to order one, depending on whether the original that came with the SNZH is one piece or if you can unscrew the crown from the stem.

You should be right about the day/date wheels not needing to be changed. All of the nh36 movements I have had came with the 3oclock version. Note that you’ll have to add the day wheel if you go with an nh35 rather than nh36.

Good luck!
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Old 04-24-2018, 07:43 AM   #3 (permalink)
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I did it. Crown and stem were separate. Measure and measure again to make sure you get the length right. The stem needed to be a touch longer for the NH than for the 7S.

Iirc I had to reuse the mov’t spacer from the original mov’t on the NH36.


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Old 04-24-2018, 02:00 PM   #4 (permalink)
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I just did this in an SNZG. I ordered a new stem and clipped it to size and it drops right in.
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Old 04-30-2018, 01:45 AM   #5 (permalink)
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Nice job OCD that came up well ! Something a bit different.
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Old 05-11-2018, 07:34 AM   #6 (permalink)
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Thant came out very nicely.

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Old 05-28-2018, 11:48 AM   #7 (permalink)
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that is a beauty....very well done....love these snzg cases...they are perfect size
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Old 05-29-2018, 03:04 AM   #8 (permalink)
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So the movement I bought from crystal times does come with a stem.
Perhaps someone can clarify if that stem can be used (is it separate to the crown supplied with the movement) or is another stem entirely needed?


If the latter - where can I buy the relevant one?


Is the stem fitted to the crown just by pressure, or is it screwed in? How to remove and refit stem from crown?


Thanks
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Old 05-29-2018, 04:57 PM   #9 (permalink)
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Finally got around to doing a handwinding and hacking FFF.

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Old 05-29-2018, 05:05 PM   #10 (permalink)
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Quote:
Originally Posted by vladtepes View Post
So the movement I bought from crystal times does come with a stem.
Perhaps someone can clarify if that stem can be used (is it separate to the crown supplied with the movement) or is another stem entirely needed?


If the latter - where can I buy the relevant one?


Is the stem fitted to the crown just by pressure, or is it screwed in? How to remove and refit stem from crown?


Thanks
Remove the existing stem from the watch to be modded. Remove the stem gasket. Don't burn your hands - hold the existing stem with a pin vice or something suitable - hold a flame under the crown to help break any thread lock - then unscrew the crown.
Use the removed stem as a guide for length, then cut the stem that came with the cousins movement a touch longer. Refit the stem gasket. File a little, rounding the stem thread slightly then trial fit, file a little more then trial fit.....

Hope that helps.

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Last edited by 1jayzon; 05-29-2018 at 05:08 PM.
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Old 05-31-2018, 12:28 AM   #11 (permalink)
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1jayzon - first that is bloody BEAUTIFUL !
Care to share where the various parts are from?
Is that a lumed bezel insert?


Thanks for the tip re the stem. Sounds like a PITA


Best way to remove/refit the stem gasket? (I assume you mean the one actually on the crown tube thingy whatsit?
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Old 05-31-2018, 03:32 AM   #12 (permalink)
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Quote:
Originally Posted by vladtepes View Post
1jayzon - first that is bloody BEAUTIFUL !
Care to share where the various parts are from?
Is that a lumed bezel insert?


Thanks for the tip re the stem. Sounds like a PITA


Best way to remove/refit the stem gasket? (I assume you mean the one actually on the crown tube thingy whatsit?
Thanks.

I only say to remove the gasket to you don't accidentally melt it when heating the crown to loosen any thread locking stuff.
It's fiddly but it's quite stretchy so you can just roll it down the stem until it falls off. You'll might want a smear of silicon grease on the gasket after refitting.

Cutting and filing the stem was a bit nervy the first time but it's actually dead easy as long as you take it steady. I've done 10 stem and crown - for movement upgrades now so invested in a Bergeon pin vice from Cousins , holding most of the body of the stem within the pinvice and gripping the threaded part of the stem.

It's a yobokies luminous bezel insert and yobokies dial and a sapphire (probably Crystaltimes) and a Brady sailcloth pattern strap with blue stitching.

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Last edited by 1jayzon; 05-31-2018 at 03:48 AM.
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Old 06-01-2018, 02:30 AM   #13 (permalink)
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Thank you.


pin vice ? as in https://www.cousinsuk.com/product/00...eon?code=B0180 ? What are cutting broaches - like little saws?


That's too expensive by the time I convert it to aussie dollars and add postage.


I found this locally - reckon it would do the job? https://www.littlebirdelectronics.com.au/pin-vice ?





Again that watch is just gorgeous - and is my current screen background !
Out of interest did you compare the Yobokies and dagaz FFF dials? There's some differences in the text but I'm unsure whether the actual dials are different blues or differently reflective etc. Is there a specific reason you chose the yobokies is what I'm getting at I guess.
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Old 06-01-2018, 07:10 AM   #14 (permalink)
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Quote:
Originally Posted by vladtepes View Post
Thank you.


pin vice ? as in https://www.cousinsuk.com/product/00...eon?code=B0180 ? What are cutting broaches - like little saws?


That's too expensive by the time I convert it to aussie dollars and add postage.


I found this locally - reckon it would do the job? https://www.littlebirdelectronics.com.au/pin-vice ?





Again that watch is just gorgeous - and is my current screen background !
Out of interest did you compare the Yobokies and dagaz FFF dials? There's some differences in the text but I'm unsure whether the actual dials are different blues or differently reflective etc. Is there a specific reason you chose the yobokies is what I'm getting at I guess.
That pin vice will probably be fine for what you need. Yobokies FFF dials have improved greatly and I like this one for its bevelled edge around the date window plus the curved luminous insert can only be got from yobokies. The colour is practically indistinguishable from the Dagaz dial. - both are very good.

Good luck and have fun.

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Old 06-01-2018, 12:57 PM   #15 (permalink)
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A couple more photos vladtepes

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Old 06-02-2018, 04:25 AM   #16 (permalink)
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Thanks muchly I assume that was an SNZH previously?
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Old 06-02-2018, 05:37 AM   #17 (permalink)
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This is the movement I purchased for my SNZG11K1. It came with the new stem. I used a pair of high quality wire cutters to cut the stem to size expecting the need to file the threads to screw into the crown. To my surprise the stem is tempered and snapped perfectly at the cut point and the threads stayed true and screwed right in.
The NH36/ 7s26 swap makes a good watch a great watch.

https://www.ebay.com/itm/Genuine-Jap...53.m2749.l2648
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Old 06-02-2018, 05:39 AM   #18 (permalink)
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Thanks muchly I assume that was an SNZH previously?
Yes. It was a snzh53 - I swapped in a black date wheel.

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Old 06-07-2018, 08:56 PM   #19 (permalink)
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Cheers
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Old 03-28-2019, 01:43 AM   #20 (permalink)
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Well I'm bumping this thread as I am just about ready to get this done.


The only thing I haven't got is a new stem.


It's an NH35/6 movement from CT that's going into an SNZH case.


Is anyone able to tell me SPECIFICALLY what I'll need to buy please.


Thanks heaps
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Old 03-28-2019, 02:28 AM   #21 (permalink)
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...
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Old 03-28-2019, 02:29 AM   #22 (permalink)
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Quote:
Originally Posted by vladtepes View Post
Well I'm bumping this thread as I am just about ready to get this done.


The only thing I haven't got is a new stem.


It's an NH35/6 movement from CT that's going into an SNZH case.


Is anyone able to tell me SPECIFICALLY what I'll need to buy please.


Thanks heaps
The stem usually comes with the movement from Crystaltimes. I think I have a spare though. What country are you in? I'm in the UK. DM me if you need to

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Old 03-28-2019, 02:38 AM   #23 (permalink)
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Thanks, OK I'll check that I have it then. I assume the one that comes with the movement will suit an SNZH case
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