[MrSuit]

Hi everyone, maybe you can help me.

I have a Sinn U1 purchased in early 2015. This was one of the first U1s with a Sellita movement.

I am unsure whether this is an issue or something to be expected from this movement.

What happens is as follows:-

• After you unscrew the crown and leave it in position 1, you can manually wind the watch as expected.
• When you pull the crown into position 2, you can change the date as expected.
• When you pull the crown out to position 3, and turn it to set the hands, after about four turns the crown feels like it 'slips', loses all torque and no longer move the hands. The seconds hand starts moving again, but the crown is still in position 3.
• If you then push the crown back to position 1, then pull it to position 3 again, you can continue to set the hands.

When setting the time this appears to be happening after each 5th or 6th turn of the crown, causing me to go through this process each time.

Any help is much appreciated!

 

[xzqt]

2 things i would suspect :

a) the keyless/and spring may needs adjustment
b) the min wheel may needs to be look at

Nevertheless, dont try adjusting when slippage occured. The gear may shear off.
Bring it the a watch maker to look at it and rectify.

 

[fortysix]

keyless issue! dial and hands needs to come off, so take it to a watchmaker! best not to screw around with this at home, if you're not experienced!

 

[revance]

Hmmm... I would be curious to hear what the problem ends up being. I would agree with fortysix that it is a keyless issue, but the symptoms seem very odd. I wonder if the return lever is working its way out of the clutch.

 

[CCWR]

It could be as simple as a loose screw. But I've worked on my share of these and more often than not they have issues with the setting mechanisms. They just wear out rapidly, for whatever reason. Eckcell's used to sell a kit advertised as being recommended for working on these and it included the parts in question. They do advertise that they carry Sellita parts. It's a shame that a relatively new watch like that has issues already...
I echo those that recommend a trip to the watchmaker. George

 

[Archer]

It could be as simple as a loose screw. But I've worked on my share of these and more often than not they have issues with the setting mechanisms. They just wear out rapidly, for whatever reason. Eckcell's used to sell a kit advertised as being recommended for working on these and it included the parts in question. They do advertise that they carry Sellita parts. It's a shame that a relatively new watch like that has issues already...
I echo those that recommend a trip to the watchmaker. George

Can you elaborate on what specifically wears out and what the symptoms are please? I don't see a ton of them but have serviced quite a few and have never had issues with the setting mechanisms. Automatic winding problems certainly, but not the setting...

Cheers, Al

 

[dkbs]

I guess the issue is the stem. The slot on the stem is not in the proper position. I have the same issue from a 2824 movement, especially hard to stop the second. I replaced many keyless parts but never solve the issue until I replaced the stem.

 

[CCWR]

I have seen stem problems mainly but also set lever issues. These parts seem to wear and will not maintain good engagement with each other, so the stem will become separated from the movement. Also they are, in my experience, tricky to re-insert the stem once the movement is recased. It seems there is a lot of play in the setting mechanism that results in the yoke coming out of the slot in the sliding pinion making it necessary to remove the dial to reset everything. Maybe they're better now but they gave me such trouble in the past that I started turning them away so its been a few years since I worked on one. George