Something broke while moding my seiko SKX007, and i'm not sure what

[sab1o]

Hey!

I'm new to watch making. I bought a new seiko SKX007 , and i bought a saphire crystal mod for it. I was installing it, and everything seemed to have worked correctly, but when reassembling the watch, the crown function (rotating, etc) seemed malfunctioning.

 

Now, when the crown is in the neutral position and i spin it, it makes a sound as if something was moving inside, and effectively it is. A gear is moving when rotating the crown, which can be seen in the video. It wasn't like this before, in the neutral position it would just spin and do nothing until i pulled it to the 2nd (date) or 3rd(time) position.

 

From what i've read, this might be related to a disloged yoke / keyless works? Any how, i'm not sure how to fix it. I've checked the seiko service guide by watch repair channel but i'm hoping the fix can be done without dissasembling the whole thing.

I would greatly appreciate any help, this is my first "proyect" and i would love to have it done correctly

 

[jdm]

43 minutes ago, sab1o said:

when the crown is in the neutral position and i spin it, it makes a sound as if something was moving inside, and effectively it is.

Your watch has been refitted with an NH35 mov.t, taking the winding weight from an 7S26. Hence it can be manually wound in the first crown position, which an added  feature of the NH35, the other being that it hacks. 

Quote

It wasn't like this before, in the neutral position it would just spin and do nothing until i pulled it to the 2nd (date) or 3rd(time) position.

The most likely reason it was not doing that before is because the stem has been cut too short, or the crown spring is a bit too weak, form the stem to positively reach the first position (winding) every time. That is a common occurrence when using a commercialy available stem/crown assembly. 

Furthermore, by the way the mov.t moves in the case under the action of the crown, and the color of the spacer ring, it appears that the latter is the one that comes with the NH35, which is not correct for a diver's case. The original spacer ring is a bit taller and holds better.

[sab1o]

I really appreciate your time for answering my question. This watch was sold to me as new, should I be concerned about this change of movement? Or would you rather consider it an upgrade?

[jdm]

18 minutes ago, sab1o said:

This watch was sold to me as new, should I be concerned about this change of movement? Or would you rather consider it an upgrade?

You should be able to tell a new watch from an even just slightly used one by looking at various small details, as boxing, papers, caseback and bracelet films, hair lines,etc.

Another possibility is that is counterfeit, which would be to expected considering that these went out of production like 2 years ago with demand and prices surging, and 7S26 (NH26) mov.ts aren't available anymore on the OEM market. 

Other than that the NH35 is a common and cheap upgrade or repair solution among Seiko owners.